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id="js-tlrk-nav-overlay">close mobile menu</button></nav><script async nomodule src="https://d6vtbcy3ong79.cloudfront.net/telerik-navigation/3.5.76/js/index.min.js"></script><script async type="module" src="https://d6vtbcy3ong79.cloudfront.net/telerik-navigation/3.5.76/js/index.min.mjs"></script><div id="ContentPlaceholder1_T53129E6C012_Col00" class="sf_colsIn PageWrapper tlrk" data-sf-element="EmptyWrapper" data-placeholder-label="EmptyWrapper"><div class="Section Section--olpd u-tint-blue1 u-pt10 u-pb0 u-zi2" data-sf-element="Section" data-placeholder-label="Section Banner"> <div id="ContentPlaceholder1_C447_Col00" class="sf_colsIn Section-bg Section-bg--n" data-sf-element="Section Background" data-placeholder-label="Section Background"> <img loading="lazy" class="u-contain u-m-dn" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/fidler-hub-banner-light.svg?sfvrsn=3c9d727e_0" title="Fidler-hub-banner-light" alt="Fidler-hub-banner-light" /> </div> <div id="ContentPlaceholder1_C447_Col01" class="sf_colsIn" data-sf-element="Section Content" data-placeholder-label="Section Content" style=" position: relative; z-index: 232323; "><div id="ContentPlaceholder1_C446_Col00" class="sf_colsIn container u-pr" data-sf-element="GridContainer" data-placeholder-label="GridContainer"><div class="row u-mb8" data-sf-element="Row"> <div id="ContentPlaceholder1_C449_Col00" class="sf_colsIn col-7 u-m-col-12" data-sf-element="Column 1" data-placeholder-label="Column 1"> <h1 class="u-mb3">Web and HTTP Debugging and Troubleshooting Made Simple</h1> <p class="u-fs28 u-fw3 u-mb4 u-xl-mb5">Uncover software bugs when HTTP communication is involved. The Fiddler set of tools helps you promptly identify errors to effectively fix them. Easily.</p></div> </div> <div class="row u-pb8 u-m-mb4" data-sf-element="Row"> <div id="ContentPlaceholder1_C468_Col00" class="sf_colsIn col-9 u-l-col-12" data-sf-element="Column 1" data-placeholder-label="Column 1"> <h2 class="u-mb3">Fiddler: One Product Family, Multiple Debugging Tools</h2></div> </div> </div> <div id="ContentPlaceholder1_C439_Col00" class="sf_colsIn u-pl1 u-pr1 u-s-pt4" data-sf-element="EmptyWrapper" data-placeholder-label="EmptyWrapper"><div id="ContentPlaceholder1_C466_Col00" class="sf_colsIn Section Section--mid u-tint-white BubbleBox Bubble--down u-pr u-pt0 u-pb8 u-c-white" data-sf-element="EmptyWrapper" data-placeholder-label="EmptyWrapper"><div id="ContentPlaceholder1_C460_Col00" class="sf_colsIn container u-pr u-pt10" data-sf-element="GridContainer" data-placeholder-label="GridContainer"> <div class="Tabulator-patch tabs--mobile u-zi2"><nav class="Tabulator Tabulator--dark u-df u-m-oxa u-m-ml1 u-m-mr1 u-pb3" data-tlrk-plugin="tlrkTabs" data-tlrktabs-tabs-width="auto" data-tlrktabs-wrapper-selector=".tlrk-tabs" data-tlrktabs-active-tab="1" data-tlrktabs-scroll-to-tabs="false" data-tlrktabs-set-anchors="false"><a data-sf-ec-immutable="" href="#capture-traffic" data-display="capture-traffic" class="u-full u-fs24 u-df u-fw5 is-active"><span class="u-vam u-full u-pen">Capture Traffic <br class="u-db u-l-dn" />on Your Machine </span> </a> <a data-sf-ec-immutable="" href="#network-logs" data-display="network-logs" class="u-full u-fs24 u-df u-fw5"> <span class="u-vam u-full u-pen">Get Network Logs from Your <br class="u-db u-l-dn" />Customers' Machines </span> </a> <a data-sf-ec-immutable="" href="#network-capturing" data-display="network-capturing" class="u-full u-fs24 u-df u-fw5"> <span class="u-vam u-full u-pen">Integrate Network Capturing <br class="u-db u-l-dn" />into Your Application </span> </a> </nav></div> <div class="Tabulator-body u-l-pb3 u-sm-pb0 u-m-pt4 u-s-mt4 u-cf tlrk-tabs"><div id="capture-traffic" class="Tabulator-slice is-active"><div class="row u-mb4 u-c-black"><div class="col-12"><p class="u-fs24 u-c-black">Fiddler is a web debugging proxy tool for Windows, macOS and Linux. It has evolved from Fiddler Classic into a more robust and versatile product - Fiddler Everywhere. Fiddler Everywhere is now the only HTTPS debugger version in active development and with dedicated support, and a powerful tool for developers and QA professionals that offers:</p></div></div><div class="row u-mb4 List List--checks List--inside u-a-blue1 u-c-black"><div class="col-4 u-m-col-6 u-m-mb2 u-s-col-12 List-item"><p class="u-c-black">Multiple options for capturing, including from remote device</p></div><div class="col-4 u-m-col-6 u-m-mb2 u-s-col-12 List-item"><p class="u-c-black">Support for multiple protocols</p></div><div class="col-4 u-m-col-6 u-m-mb2 u-s-col-12 List-item"><p class="u-c-black">Extensive Rules for modifying traffic</p></div><div class="col-4 u-m-col-6 u-m-mb2 u-s-col-12 List-item"><p class="u-c-black">Advanced filters for narrowing down traffic</p></div><div class="col-4 u-m-col-6 u-m-mb2 u-s-col-12 List-item"><p class="u-c-black">Offline mode</p></div><div class="col-4 u-m-col-6 u-m-mb2 u-s-col-12 List-item"><p class="u-c-black">SOC 2 certification, and a lot more</p></div></div><div class="row u-mb4 u-tac"><div class="col-11 u-m-col-11"><div class="ImagesSlider u-db"><div><ul><li class="active"><a href="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/live-traffic-ps-export-3x-min.png?sfvrsn=4437bc36_1" data-lite-info="image" title="open image" class="litebox"><img src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/live-traffic-ps-export-3x-min.png?sfvrsn=4437bc36_1" loading="lazy" class="u-br10" alt="live traffic ps export" /></a> </li><li class="next-active"><a href="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/composer-ps-export-3x-min.png?sfvrsn=d6d0915_1" data-lite-info="image" title="open image" class="litebox"><img src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/composer-ps-export-3x-min.png?sfvrsn=d6d0915_1" loading="lazy" class="u-br10" alt="composer ps export" /></a> </li><li><a href="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/wizards-ps-export-3x-min.png?sfvrsn=3f7ca4f3_1" data-lite-info="image" title="open image" class="litebox"><img src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/wizards-ps-export-3x-min.png?sfvrsn=3f7ca4f3_1" loading="lazy" class="u-br10" alt="wizard ps export" /></a> </li></ul></div><div class="SliderControls"><a href="javascript:void(0)" class="prev js-prev-image" data-sf-ec-immutable=""><svg viewBox="0 0 4 8.5" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMax meet"><path fill-opacity="0" d="m3.85,7l-3.6,-3.45l3.6,-3.45" stroke="#fff" stroke-width="0.35" stroke-linecap="square"></path></svg> </a> <a href="javascript:void(0)" class="next js-next-image" data-sf-ec-immutable="" aria-label="next image"> <svg viewBox="0 0 4 8.5" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMax meet"><path fill-opacity="0" d="m0.15,0.1l3.6,3.45l-3.6,3.45" stroke="#fff" stroke-width="0.35" stroke-linecap="square"></path></svg> </a> </div></div><div class="Testimonials-dots ImagesSlider-dots u-mt2"><a href="javascript:void(0)" class="is-active" aria-label="selected" title="go to slide 1" data-sf-ec-immutable=""></a><a href="javascript:void(0)" title="go to slide 2" data-sf-ec-immutable=""></a><a href="javascript:void(0)" title="go to slide 3" data-sf-ec-immutable=""></a></div></div></div><div class="row"><div class="col-3 u-m-col-6 u-s-col-12 u-s-mb2"><a href="/download/fiddler-everywhere" class="Btn Btn--prim u-db u-fs24" data-sf-ec-immutable="">Try for Free</a> </div><div class="col-3 u-m-col-6 u-s-col-12"><a href="/fiddler/fiddler-everywhere" class="Btn Btn--ghost u-c-black u-db u-fs24" data-sf-ec-immutable="">Learn more</a> </div><div class="col-12 u-mt2 u-c-black">For more information on Fiddler Classic, click <a href="/fiddler/fiddler-classic" class="u-tdu" data-sf-ec-immutable="">here</a>.</div></div></div><div id="network-logs" class="Tabulator-slice"><div class="row u-mb4"><div class="col-12"><p class="u-fs28 u-fw3 u-c-black">Fiddler Everywhere Reporter is a free cross-platform traffic capture tool which allows you to: </p></div></div><div class="row u-mb4 List List--checks List--inside u-a-blue1 u-c-black"><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Start instantly without installation, perfect for restricted-permission environments </p></div><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Skip registration or licensing, ensuring a faster and hassle-free setup </p></div><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Capture data easily even as a non-technical user </p></div><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Receive web traffic from end users or internal teams for debugging </p></div></div><div class="row u-mb6 u-tac"><div class="col-11 u-m-col-11"><a href="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/reporter-screenshot-251501.png?sfvrsn=fa34e9ff_3" data-lite-info="image" title="open image" class="litebox"><img src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/reporter-screenshot-251501.png?sfvrsn=fa34e9ff_3" loading="lazy" class="u-br10" alt="fiddler_cap" /></a> </div></div><div class="row"><div class="Dropdown col-3 u-m-col-6 u-s-col-12 u-s-mb2" data-tlrk-plugin="dropdown"><a data-sf-ec-immutable="" href="#download-trial-file" aria-label="Start Free Trial Button" class="Dropdown-control u-db Btn Btn--prim2 Btn--l u-fs24 track--kui-trial-cta2-dropdown" data-track-instance="1"><span class="u-vam">Try for Free</span> <span class="Dropdown-arrow"></span></a> <div class="DashMenu u-pa u-fs20 u-tac"><a class="u-db u-wsn" href="https://api.getfiddler.com/reporter/win/latest" data-sf-ec-immutable="">Windows - Portable App </a> <a class="u-db u-wsn" href="https://api.getfiddler.com/reporter/win-zip/latest" data-sf-ec-immutable="">Windows - Zip</a> <a class="u-db u-wsn" href="https://api.getfiddler.com/reporter/mac/latest-mac" data-sf-ec-immutable="">Intel Mac</a> <a class="u-db u-wsn" href="https://api.getfiddler.com/reporter/mac-arm64/latest-mac" data-sf-ec-immutable="">ARM Mac</a> </div></div><div class="col-3 u-m-col-6 u-s-col-12"><a href="/fiddler/fiddler-everywhere-reporter" class="Btn Btn--ghost u-c-black u-db u-fs24" data-track-instance="3" data-sf-ec-immutable="">Learn more</a> </div></div></div><div id="network-capturing" class="Tabulator-slice"><div class="row u-mb4"><div class="col-12"><p class="u-fs28 u-fw3 u-c-black">FiddlerCore is an embeddable .NET library which enables you to: </p></div></div><div class="row u-mb4 List List--checks List--inside u-a-blue1 u-c-black"><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Integrate traffic capture capabilities directly into your code</p></div><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Monitor and analyze traffic within your application </p></div><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Gain deep insights and superior performance analysis</p></div><div class="col-6 u-m-col-6 u-s-col-12 u-s-mb2 List-item"><p class="u-c-black">Discover delays, missing services and threats in minutes not days</p></div></div><div class="row"><div class="col-3 u-m-col-6 u-s-col-12 u-s-mb2"><a href="/try/fiddlercore" class="Btn Btn--prim u-db u-fs24" data-sf-ec-immutable="">Try for Free</a> </div><div class="col-3 u-m-col-6 u-s-col-12"><a href="/fiddlercore" class="Btn Btn--ghost u-c-black u-db u-fs24" data-track-instance="2" data-sf-ec-immutable="">Learn more</a> </div></div></div></div></div> <div id="ContentPlaceholder1_C461_Col00" class="sf_colsIn container u-l-pt4 u-l-mt4 u-m-dn" data-sf-element="GridContainer" data-placeholder-label="GridContainer"> <img loading="lazy" class="u-pa u-r0 u-b0" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/fiddler-ninja.svg?sfvrsn=a28c7c47_1" title="Fiddler Ninja" alt="fiddler ninja" /> </div> </div> </div> </div> </div> <section class="Section u-tint-blue1 u-pb8 u-pt8" data-sf-element="Section" data-placeholder-label="Section"> <div id="ContentPlaceholder1_C426_Col00" class="sf_colsIn container" data-sf-element="Section Content" data-placeholder-label="Section Content"> <h2 class="u-mb1 u-s-mt4">How to Start Your Fiddler Journey</h2><div id="ContentPlaceholder1_C431_Col00" class="sf_colsIn u-pt4" data-sf-element="EmptyWrapper" data-placeholder-label="EmptyWrapper"> <img loading="lazy" class="u-mb2 u-s-dn" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/how-it-works.png?sfvrsn=23d9166c_2" title="how-it-works" alt="how-it-works" /> </div> <div class="row row--fiddler-howitworks" data-sf-element="Row"> <div id="ContentPlaceholder1_C429_Col00" class="sf_colsIn col-4" data-sf-element="Column 1" data-placeholder-label="Column 1"> <p class="u-fs24"><span class="Indicator Indicator--powder u-fs20 u-fwb u-lh140 u-dn u-s-dib">1</span> Try the Fiddler product(s) and the web debugger that aligns with your needs.</p></div> <div id="ContentPlaceholder1_C429_Col01" class="sf_colsIn col-4" data-sf-element="Column 2" data-placeholder-label="Column 2"> <p class="u-fs24"><span class="Indicator Indicator--powder u-fs20 u-fwb u-lh140 u-dn u-s-dib">2</span> Integrate Fiddler into your workflow for rapid, elegant debugging and troubleshooting.</p></div> <div id="ContentPlaceholder1_C429_Col02" class="sf_colsIn col-4" data-sf-element="Column 3" data-placeholder-label="Column 3"> <p class="u-fs24"><span class="Indicator Indicator--powder u-fs20 u-fwb u-lh140 u-dn u-s-dib">3</span> You’ll start realizing the high value of benefits of Fiddler through the acceleration of both your time and cost savings.</p></div> </div> </div> </section> <section class="Section u-pt10 u-pb5 u-s-pt4" data-sf-element="Section" data-placeholder-label="Section"> <div id="ContentPlaceholder1_C364_Col00" class="sf_colsIn container" data-sf-element="Section Content" data-placeholder-label="Section Content"> <div class="row"><div class="col-11"><h2 class="u-mb1 u-c-black">Hundreds of Thousands of Organizations <br />are Using Fiddler</h2><p class="u-fs28 u-fw3 u-c-grey4 u-mb4">Join these companies and the 4 million developers who are already building, running, and debugging with Fiddler proxy tools.</p></div></div> <style> @media (max-width: 420px) { .Logos { margin: 0!important; padding: 0 !important; font-size: 0; } .Logos img, .Logos svg { max-width: 40%; margin: 5% !important; } .Logos-row { width: 100%; } .Logos .Logos-row-1 img, .Logos .Logos-row-1 svg { width: 23.33333% !important; margin: 5% !important; } img.Logos-wide { margin: 7% !important; } .Logos-row-1 img.Logos-wide, .Logos svg.Logos-wide, .Logos svg.Logos-widest { min-width: 33% !important; margin-left: 0 !important; margin-right: 0 !important; } .Logos svg.Logos-widest { min-width: 50% !important; } .Logos-row-3 img.Logos-wide { margin: 7% 5% !important; } } </style> <div class="u-tac Logos"> <div class="u-dib Logos-row Logos-row-1">  <img class="u-dib u-vam u-m2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/labs/nasa.png?sfvrsn=90a26329_3" alt="Nasa"></img>  <img class="u-dib u-vam u-m2 Logos-wide" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/labs/microsoft.png?sfvrsn=b114627d_3" alt="microsoft"></img>  <img class="u-dib u-vam u-m2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/labs/fox.png?sfvrsn=abb943f0_3" alt="fox"></img> </div> <div class="u-dib Logos-row Logos-row-2">  <img class="u-dib u-vam u-m2 Logos-wide" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/labs/samsung.png?sfvrsn=40ce6ce4_3" alt="samsung"></img>  <img class="u-dib u-vam u-m2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/labs/ibm.png?sfvrsn=cf536f36_3" alt="ibm"></img> </div> <div class="u-dib Logos-row Logos-row-3">  <img class="u-dib u-vam u-m2 Logos-wide" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/labs/continental.png?sfvrsn=4993ae58_3" alt="continental airlines"></img>  <img class="u-dib u-vam u-m2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/labs/volvo.png?sfvrsn=7c26bbde_3" alt="volvo"></img> </div> </div> </div> </section> <div class="Section u-bg-blue u-pb8 u-pt8"><div class="Section-bg"><img src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/2017-06/wave-min.png?sfvrsn=b2814152_6" loading="lazy" alt="G2 User Awards Background" /></div><div class="container"><div class="row u-s-tac"><div class="u-dib u-mr1 u-s-mb3"><img src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/2017-06/g2-badge.png?sfvrsn=61d49c2f_3" alt="G2 Badge 4.4 stars out of 5" /></div><div class="col-8"><h3 class="u-mb2">4.4 Out of 5 Overall User Rating</h3><p class="u-fs28 u-fw3">Don’t just take our word for it. G2 Users have consistently rated Fiddler 4.4 out of 5 stars. G2 is a renowned peer-to-peer review site that aggregates user reviews for business software.</p></div></div></div></div><section class="Section u-pt8 u-pb7" data-sf-element="Section" data-placeholder-label="Section"> <div id="ContentPlaceholder1_C370_Col00" class="sf_colsIn container" data-sf-element="Section Content" data-placeholder-label="Section Content"> <h2 class="u-mb5">Support & Learning</h2><div class="row" data-sf-element="Row"> <div id="ContentPlaceholder1_C372_Col00" class="sf_colsIn col-3" data-sf-element="Column 1" data-placeholder-label="Column 1"> <div class="u-ttu u-fs17 u-fw5 u-c-black u-lh140 u-mb1">Blog</div> <img loading="lazy" class="u-db u-mb2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/how-to-select-the-right-fiddler-tool-for-you-thumbnail.png?sfvrsn=4f8bb8bd_1" title="how to select the right fiddler tool for you thumbnail" alt="how to select the right fiddler tool for you thumbnail" /> <a href="/blogs/how-to-select-the-fiddler-tool-or-solution-that-aligns-with-your-debugging-and-troubleshooting-requirements" class="u-db HoverBox u-a-white u-fs24">How to Select the Right Fiddler Tool for You</a></div> <div id="ContentPlaceholder1_C372_Col01" class="sf_colsIn col-3" data-sf-element="Column 2" data-placeholder-label="Column 2"> <div class="u-ttu u-fs17 u-fw5 u-c-black u-lh140 u-mb1">Resource</div> <img loading="lazy" class="u-db u-mb2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/fiddler-everywhere-faq-thumbnail.svg?sfvrsn=37377b64_0" title="fiddler everywhere faq thumbnail" alt="fiddler everywhere faq thumbnail" /> <a class="u-db HoverBox u-a-white u-fs24" href="/fiddler/fiddler-everywhere/faq">Fiddler Everywhere – Licensing and Purchasing FAQs</a></div> <div id="ContentPlaceholder1_C372_Col02" class="sf_colsIn col-3" data-sf-element="Column 3" data-placeholder-label="Column 3"> <div class="u-ttu u-fs17 u-fw5 u-c-black u-lh140 u-mb1">Resource</div> <img loading="lazy" class="u-db u-mb2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/fiddler-everywhere-intro.png?sfvrsn=bf9db603_1" title="fiddler-everywhere-intro" alt="fiddler-everywhere-intro" /> <a class="u-db HoverBox u-a-white u-fs24" href="https://docs.telerik.com/fiddler-everywhere/introduction" target="_blank" rel="noopener" data-sf-ec-immutable="">Fiddler Everywhere - Getting Started</a></div> <div id="ContentPlaceholder1_C372_Col03" class="sf_colsIn col-3" data-sf-element="Column 4" data-placeholder-label="Column 4"> <div class="u-ttu u-fs17 u-fw5 u-c-black u-lh140 u-mb1">Contact us</div> <img loading="lazy" class="u-db u-mb2" src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/productsimages/fiddler/how-can-we-help-thumbnail.png?sfvrsn=17139d5d_1" title="how can we help thumbnail" alt="how can we help thumbnail" /> <a href="/contact" class="u-db HoverBox u-a-white u-fs24" target="_blank">How Can We Help? We'd Love to Hear from You!</a></div> </div> </div> </section> <section class="Section u-pt8 u-pb7" data-sf-element="Section" data-placeholder-label="Section"> <div id="ContentPlaceholder1_C452_Col00" class="sf_colsIn container" data-sf-element="Section Content" data-placeholder-label="Section Content"> <h2 class="u-mb4">Glossary</h2><div class="row" data-sf-element="Row"> <div id="ContentPlaceholder1_C453_Col00" class="sf_colsIn col-3" data-sf-element="Column 1" data-placeholder-label="Column 1"> <ul class="List"> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">Network Debugging <em class="TK-Arrow"></em></a> <div class="Answer u-fs16 u-pt1" style="display:none;">Network debugging is the process of identifying and resolving issues in web applications by inspecting and modifying HTTP/S traffic between a client, usually a web browser, and a server. It involves using tools to intercept, analyze, and manipulate web requests and responses, allowing developers to troubleshoot problems, optimize performance, and ensure security and functionality. Common tasks in web debugging include examining network traffic, checking for errors in code, and testing how the application behaves under different conditions. <a href="/fiddler/fiddler-everywhere" data-sf-ec-immutable="">Fiddler Everywhere</a> is a powerful web debugging proxy to facilitate your debugging efforts and optimize your processes. </div> </li> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">Network Capturing <em class="TK-Arrow"></em></a> <div class="Answer u-fs16 u-pt1" style="display:none;">The process of intercepting, recording, and analyzing data packets as they travel across a network, allowing developers and QA professionals to monitor the communication between devices, identify issues, diagnose problems, and ensure the security and performance of networked applications. </div> </li> </ul></div> <div id="ContentPlaceholder1_C453_Col01" class="sf_colsIn col-3" data-sf-element="Column 2" data-placeholder-label="Column 2"> <ul class="List"> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">Bug <span class="TK-Arrow"></span></a> <div class="Answer u-fs16 u-pt1" style="display:none;">An error, flaw, or fault in a software program that causes it to produce incorrect or unexpected results or behave unexpectedly.  </div> </li> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">Logging <span class="TK-Arrow"></span></a> <div class="Answer u-fs16 u-pt1" style="display:none;">The process of recording detailed information about the application's execution, often used to track events, errors, and data flow, which helps in identifying issues during debugging.  </div> </li> </ul></div> <div id="ContentPlaceholder1_C453_Col02" class="sf_colsIn col-3" data-sf-element="Column 3" data-placeholder-label="Column 3"> <ul class="List"> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">Breakpoint <span class="TK-Arrow"></span></a> <div class="Answer u-fs16 u-pt1" style="display:none;">A marker set in the code where the execution will pause, allowing developers to inspect the state of the application at that specific point.  </div> </li> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">HTTP/HTTPS <span class="TK-Arrow"></span></a> <div class="Answer u-fs16 u-pt1" style="display:none;">The main protocols for web communication, where HTTP (Hypertext Transfer Protocol) and HTTPS (HTTP Secure) are used to send and receive data between a client and a server.  </div> </li> </ul></div> <div id="ContentPlaceholder1_C453_Col03" class="sf_colsIn col-3" data-sf-element="Column 4" data-placeholder-label="Column 4"> <ul class="List"> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">Request/Response <span class="TK-Arrow"></span></a> <div class="Answer u-fs16 u-pt1" style="display:none;">The basic communication model in web debugging, where a client sends a request to the server, and the server returns a response. Analyzing these helps identifying issues.  </div> </li> <li class="u-pt2 u-pb2" style="border-bottom:1px solid rgba(68, 79, 118, 0.5);"><a class="Question u-fs24" href="javascript:void(0)" data-sf-ec-immutable="">Cookies <span class="TK-Arrow"></span></a> <div class="Answer u-fs16 u-pt1" style="display:none;">Small pieces of data used to track user activity that the web server generates and sends to a web browser, which stores the cookies for a predetermined period of time. Debugging often involves inspecting cookies to ensure they are set, sent, and received correctly.  </div> </li> </ul></div> </div> </div> </section> <div class="Section u-pt5 u-pb8 u-tint-blue1" data-sf-element="Section" data-placeholder-label="Section Banner"> <div id="ContentPlaceholder1_C401_Col00" class="sf_colsIn Section-bg Section-bg--containB" data-sf-element="Section Background" data-placeholder-label="Section Background"> <img src="https://d585tldpucybw.cloudfront.net/sfimages/default-source/decorations/prefooter-decor.svg" alt="prefooter-decor" loading="lazy" /></div> <div id="ContentPlaceholder1_C401_Col01" class="sf_colsIn container" data-sf-element="Section Content" data-placeholder-label="Section Content"><div class="row" data-sf-element="Row"> <div id="ContentPlaceholder1_C403_Col00" class="sf_colsIn col-8 u-vam u-l-col-6 u-m-col-12" data-sf-element="Column 1" data-placeholder-label="Column 1"> <h2 class="u-mb3">A Trial of Any of the Fiddler Products Gives You:</h2> <ul class="u-a-blue1 Space--cozy u-mb6"><li>A fully functional version of the software.</li><li>Strict data privacy protection. 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