Free utilities that run in your browser. Most processing stays on your device.
Generate ULIDs (Universally Unique Lexicographically Sortable Identifiers) easily.
Get the geolocation of an IP address.
Decode JWT header and payload in your browser.
Create HS256 or unsigned JWTs for testing.
Generate development TOTP codes locally.
SHA-256, SHA-1, and MD5 hashes.
Sign messages with HMAC-SHA in the browser.
Hash and verify passwords with bcrypt locally.
Inspect PEM blocks for certs and keys.
Generate secure API keys and tokens.
Create strong passwords with custom options.
Generate UUIDs and ULIDs in bulk.
Generate QR codes from text or URLs.
Turn titles into URL-friendly slugs.
Generate placeholder text instantly.
Build a .gitignore for common stacks.
Convert images to Base64 data URIs.
Encode and decode Base64 text.
Percent-encode and decode URLs.
Escape and unescape HTML entities.
camelCase, snake_case, kebab-case, and more.
Convert HEX, RGB, and HSL locally.
Convert between YAML and JSON.
Convert CSV tables to JSON and back.
Format, minify, and validate JSON.
Preview Markdown as HTML locally.
Compare two texts line by line.
Convert Unix timestamps to dates and back.
Test regular expressions against sample text.
Explain 5-field cron expressions.
Query A, MX, TXT and more via DNS-over-HTTPS.
CIDR network, mask, and host range.
Look up HTTP status meanings quickly.
Parse browser, OS, and device from a UA string.
Catch common Dockerfile mistakes locally.
Paste an OpenAPI spec and list endpoints.
Send HTTP requests from the browser (CORS applies).