100% private · offline
Data Tools
Format, convert, encode, generate secrets and QR codes - all in your browser.
JSON Formatter
Pretty-print, minify, and validate JSON entirely in your browser.
JSON ↔ YAML
Convert JSON to YAML and YAML to JSON offline - great for configs.
CSV ↔ JSON
Turn CSV rows into JSON objects (or back) with quoted-field support.
Base64 Encode / Decode
Encode text to Base64 or decode it back - private and offline.
URL Encode / Decode
Percent-encode and decode URL components without a server.
JWT Decoder
Decode JWT header and payload locally. Signature is never verified here.
Hash Generator
Generate SHA-256 and SHA-1 digests for text via WebCrypto - input never leaves your device.
UUID Generator
Generate random UUIDs (v4) in bulk for IDs and test data.
Unix Timestamp
Convert between Unix timestamps and human-readable dates.
Number Base Converter
Convert binary, octal, decimal, and hex live - with hex literals and fixed-width views.
Hex / Bytes Converter
Live convert hex, UTF-8 text, decimal, binary, and Base64 - type in any field.
Color Converter
Live convert hex, RGB, HSL, and HSV - type in any field.
QR Code Generator
Create QR codes for URLs, Wi-Fi, email, phone, and text. PNG + SVG download.
Password Generator
Strong random passwords via Web Crypto - length, charsets, no lookalikes.
Regex Tester
Test regular expressions, inspect capture groups, and preview replacements safely.
Cron Parser
Explain five-field cron schedules and preview their next run times.
JWT Secret Generator
Generate high-entropy HMAC signing secrets in Base64URL or hexadecimal.
Random Picker
Pick one or more items fairly from a pasted list using browser crypto.
Lorem Ipsum Generator
Generate placeholder words, sentences, or paragraphs for layouts.