Free Developer Tools
A small set of browser-based tools for the developer tasks that come up every day: generating API keys and JWT secrets, checking whether a password has shown up in a breach, computing a SHA-256 of a release binary before trusting it, encoding a bearer token with base64, minting UUIDs for a seed file. Each tool runs entirely in your browser.
We built these because we want developers who search for sha256 hash generator or generate api key to land on a tool that treats them like a professional — no login walls, no ads for secrets-as-a-service, and no server that quietly logs the values they paste in. Every tool is free, every result stays on your machine, and every page tells you exactly which Web Crypto API or algorithm is doing the work.
If you’re here because you’re tired of pasting canonical secrets into Slack and chasing the latest .env across three machines, that’s what localWiki is for — a local-first encrypted vault for dev team secrets and setup docs. Free for solo developers.
- generate api keyOpen the Secret & API Key Generator
Cryptographically secure random strings for API keys, JWT secrets, and tokens. Generated in your browser — never sent anywhere.
- password strength testOpen the Password Strength Checker
Real-time entropy, estimated crack time, and optional breach check. Your password stays in your browser unless you explicitly run the breach check.
- sha256 hash generatorOpen the Hash Generator
Compute SHA-256, SHA-384, and SHA-512 of text or a file. Verify a release checksum without uploading anything.
- base64 encodeOpen the Base64 Encoder & Decoder
Encode or decode text and files. Standard and URL-safe variants. All in your browser.
- uuid generatorOpen the UUID Generator
Generate UUID v4 (random) or v7 (time-sorted). Bulk mode. Runs in your browser.
Stop chasing the latest .env.
localWiki keeps your team’s canonical secrets, environment variables, and setup docs in one encrypted local-first vault — and injects them into your services with lol run. No cloud copy. Free for solo devs.