f0ng/captcha-killer-modified

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1948 stars · 179 forks observed · 2026-08-28

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

A modified version of the captcha-killer Burp Suite extension that intercepts captcha images from HTTP responses and recognizes them using the free ddddocr OCR library. It supports base64/data:image encoded captchas, keyword-based captcha extraction, and is adapted for newer Burp Suite and JDK versions.

Use cases

• automate captcha solving during burp intruder brute-force attacks
• recognize base64 data:image captchas in login forms
• extract captcha images from http responses by keyword
• test captcha-protected login endpoints during authorized pentests
• ocr captcha recognition without paid api services

When to choose

• you need a free, offline captcha OCR solution integrated into Burp Suite
• target captchas are returned as base64 data URIs that the original captcha-killer cannot handle
• you run a modern Burp Suite with a newer JDK where the original plugin breaks

When to avoid

• you need high-accuracy recognition of complex captchas beyond ddddocr's ~85% success rate
• you require a tool with a clear open-source license (this repo has none)
• you are not working within Burp Suite or lack a JVM environment

Facets

plugin · maturity active

ocr security penetration-testing image-processing developer-tools security penetration-testing browser-extensions image-processing cross-platform jvm burp-extension captcha-recognition captcha-bypass ddddocr intruder penetration-testing-tool java

Member repositories

For agents

markdown · JSON · MCP: product_card(name="f0ng/captcha-killer-modified")