Everyday developer utilities, all in one place — instant, private, no setup.
JSON Tools
Format, minify, validate, clean up, and diff JSON
JSON ↔ CSV
Convert between JSON and CSV with flatten/unflatten support
Base64
Encode and decode Base64 with MIME/image/PDF detection
Hidden Characters
Find and strip invisible Unicode characters
HTML Viewer
Sanitize, validate, and preview HTML snippets
Regex Tester
Match, highlight, and replace with JavaScript regular expressions
Markdown Diff
Side-by-side, unified, or rendered diff of two Markdown docs
SQL Diff
Side-by-side or unified diff of two SQL queries
MarkItDown
Convert documents (docx, pdf, pptx, xlsx, html…) to Markdown
SQLite Playground
Import a CSV and run SQL against it, entirely in your browser
Crypto Tools
Generate API keys, UUIDs, and decode JWTs
HTTP Client
Send HTTP requests from the server, with SSRF protection
OpenRouter
Test prompts against OpenRouter models — key stays in session only
RequestBin
Capture inbound webhook requests to a temporary URL
Cron Parser
Validate cron expressions and preview upcoming run times
Pomodoro Timer
Focus timer with work/break intervals
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