HTTP Debug Proxy Inspector

By Nguyen Van Thanh

View on Snapcraft.io
Version2.1.0
Revision2
Size70.0 MB
LicenseMIT
Confinementstrict
Basecore22

Local HTTP/HTTPS debugging proxy - capture, rewrite, breakpoints, HAR

ScreenshotScreenshotScreenshot

HTTP Debug Proxy Inspector is a Linux alternative to Fiddler Classic for
inspecting and debugging web and API traffic. It runs a real local HTTP proxy
(default 127.0.0.1:8888) and logs every request and response that passes
through it.

FEATURES:
- Session list with method, URL, status, body size, timing (connect / wait /
receive), full request and response headers and bodies (gzip/deflate are
decoded for viewing, JSON is pretty-printed).
- HTTPS: by default CONNECT requests are tunnelled and only the host, the
bytes sent/received and the duration are shown - the encrypted content is
NOT decrypted. Optional HTTPS decryption creates a local CA with the openssl
binary; it only works for clients where you explicitly import and trust that
CA certificate (export button provided). HTTP/1.1 only.
- Rules that really modify live traffic: block URL (403), set/remove request
headers, set response headers, regex replace of request/response bodies,
override response status.
- Request and response breakpoints: the connection is paused until you edit
the raw message and resume it, or abort it.
- Composer: build or replay any captured request (directly or through the
proxy so rules apply).
- Export the captured session to HAR 1.2 JSON.

Point your browser, curl (export httpproxy / httpsproxy) or any app to the
proxy address. The app does not change system proxy settings for you.
Limitations: WebSocket/Upgrade and HTTP/2 are not proxied in decryption mode;
responses are buffered before they are forwarded (no streaming).

A Linux alternative to Fiddler Classic. Not affiliated with or endorsed by
Progress Software Corporation or Telerik.

Support development: https://buymeacoffee.com/thanhnv128b

Update History

2.0.0 (1) → 2.1.0 (2)
14 Nov 2026, 10:30 UTC
2.0.0 (1)
12 Nov 2026, 12:45 UTC

Published12 Nov 2026, 12:35 UTC

Last updated14 Nov 2026, 09:59 UTC

First seen12 Nov 2026, 12:45 UTC