Open Source Maintainer Toolkit
Maintaining an open-source project means reviewing pull requests, triaging issues, verifying checksums, and documenting APIs — often across multiple repositories and languages. These free, browser-based tools help you handle the repetitive maintenance tasks faster so you can spend more time on the work that matters: writing code and supporting your community.
Code Diff Tool
Compare contributor patches, configuration changes, or generated output side by side. Faster than cloning a fork and running git diff when you just need a quick visual review of a small change.
JSON Formatter & Validator
Validate package.json, tsconfig.json, or any JSON configuration submitted in a pull request. Catches the sneaky trailing-comma or missing-bracket issues that break CI.
RegExp Tester
Test regex patterns contributed in PRs before merging. Verify that new input validators, log parsers, or route matchers work correctly against a range of sample inputs.
MD5 / Hash Generator
Generate SHA-256 checksums for release binaries, verify artifact integrity, and provide hash values in release notes so users can validate their downloads.
Code to Image
Create clean, shareable code images for README files, release announcements, and social media posts. Syntax-highlighted snippets look far better than screenshots of your terminal.
Base64 Encoder / Decoder
Decode Base64-encoded secrets, tokens, or binary data referenced in issues and pull requests. Inspect encoded CI/CD variables without running a local script.
JSON to YAML Converter
Convert JSON examples in documentation to YAML for projects that use YAML configuration. Keep your docs consistent regardless of which format contributors submit.
Duplicate Line Remover
Clean up duplicate entries in contributor lists, changelog files, dependency lists, or issue label exports. Faster than writing a sort | uniq pipeline.
Character Counter
Check character counts for npm package descriptions, GitHub repository descriptions, and social media announcements that have strict length limits.
Timestamp Converter
Convert Unix timestamps in CI logs, issue reports, and release metadata to human-readable dates. Helps correlate events across time zones when debugging CI failures.
Password Generator
Generate strong tokens for GitHub Actions secrets, API keys for integration tests, or webhook signing secrets. Copy directly into your repository settings.
QR Code Generator
Create QR codes for project URLs, donation pages, or documentation links. Useful for conference posters, sticker designs, and printed handouts at meetups.