Playground
Dev utilities and life tools. Everything private by default — most tools never send your data to a server.
Developer (8)
JSON Formatter
Validate, beautify and minify JSON with Monaco editing and workspaces.
100% client-side
Paste → Format
Open JSON Compare
Structural diff for JSON by key — missing, added and mismatched fields.
100% client-side
Open Text Compare
Side-by-side diff with unified view, ignore rules and merge.
100% client-side
Open Encoder / Decoder
Base64, URL, JWT, AES and ChaCha — inspect tokens without a server.
Keys never leave browser
Open Comment Remover
Strip comments by language with preview and confidence levels.
100% client-side
Open Offline Editor
Local-first notes with favorites — works without an account.
Stored on device
Open Online Editor
Synced notes with shareable links and code-block paste mode.
Open
Sticker Converter
Trim, crop and export video to animated stickers under size limits.
Files stay local
Open