privacypass/challenge-bypass-extension

Health v2 · maintenance only

Adoption not part of the score

1250 stars · 188 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A browser extension implementing the client side of the Privacy Pass protocol, which issues and redeems unlinkable cryptographic tokens (based on VOPRFs) so users can bypass CAPTCHA challenges, e.g. on Cloudflare-protected sites, without solving them. The project is deprecated and no longer under active development.

Use cases

• bypass cloudflare captchas automatically
• redeem privacy pass tokens instead of solving captchas
• browse websites anonymously without repeated captcha challenges
• get unlinkable cryptographic tokens after solving a captcha
• avoid captcha fatigue on protected websites

When to choose

• you need a client for Privacy Pass providers like Cloudflare or hCaptcha
• you want to study or fork a reference implementation of the Privacy Pass protocol
• you value unlinkable, privacy-preserving captcha redemption

When to avoid

• you need a maintained extension - this project is deprecated
• the website you visit does not support Privacy Pass providers
• you need server-side issuance or redemption logic rather than the browser client

Facets

plugin · maturity abandoned

cryptography security privacy privacy browser-extensions security censorship-circumvention browser-extension browser privacy-pass captcha-bypass voprf unlinkable-tokens chrome-extension firefox-addon deprecated javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="privacypass/challenge-bypass-extension")