v1.0 · 5 tools · no login
Small tools.
Faster workflows.
An everyday developer toolbox for JSON, tokens, data formats and regex — processed right in your browser.
JSON Lab
Format, minify, validate, explore as a tree, generate TypeScript.
JSON Diff
Structural comparison: added, removed, changed, type-changed.
JWT Inspector
Decode header & claims locally, check exp / nbf timing.
Data Converter
JSON ⇄ YAML, JSON ⇄ CSV, URL and Base64 encoding.
Regex Playground
Test JavaScript regex with highlights and capture groups.
Local-first. Every tool runs in your browser. Your input isn't uploaded, logged, or stored — only your theme and recently opened tools are kept on this device. Read the privacy notes