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Overview
Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.
News
Dictionary Compression is finally here, and it's ridiculously good
Dictionary compression could completely change how applications send data over the web. It's recently gained broad support, and offers absurd real-world traffic reductions: initial testing shows YouTube JS download size for returning desktop users shrinki
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Funding the OSS Stack: HTTP Toolkit & Open Source in 2025
HTTP Toolkit, like effectively all software businesses, depends on a huge quantity of open-source code for much of its fundamental functionality & infrastructure. Most of this is tirelessly maintained by volunteers, completely for free! This honestly is a
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HTTP/3 is everywhere but nowhere
HTTP/3 has been in development since at least 2016, while QUIC (the protocol beneath it) was first introduced by Google way back in 2013. Both are now standardized, supported in 95% of users' browsers, already used in 32% of HTTP requests to Cloudflare, a
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HTTP Toolkit is joining the Open Source Pledge
The Open Source Pledge is a new push to make companies commit to funding the maintainers of the open-source software they depend on, and to publicly recognize the ones that do. HTTP Toolkit has donated back to maintainers for a few years now, but joining
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ERR_PROXY_CONNECTION_FAILED errors with HTTP proxies
If you're using a local debugging proxy tool like HTTP Toolkit, you might run into the dreaded ERR_PROXY_CONNECTION_FAILED error in Chrome and other similar apps. This can be a very frustrating and unhelpful error! There's only a few possible causes thoug
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