Pick a tool. Everything runs locally in your browser.
12 tools
- Text
Regex Tester
Test regular expressions with live match highlighting.
Open - Format
JSON Formatter
Pretty-print and validate JSON with parse error details.
Open - Format
YAML ↔ JSON
Convert between YAML and JSON with inline parse errors.
Open - Format
XML Formatter
Pretty-print XML and surface parse errors inline.
Open - Convert
Crontab Parser
Parse a cron expression to see the next 5 fire times and a plain-English description.
Open - Convert
Image ↔ Base64
Convert an image file to a Base64 data URL, or preview a data URL as an image.
Open - Convert
Mermaid Editor
Write Mermaid diagram source and see it rendered live.
Open - Generate
QR Generator
Generate a QR code from any text or URL.
Open - Generate
UUID Generator
Generate v4 UUIDs using the browser crypto API.
Open - Text
HTTP Status Codes
Searchable reference for all standard HTTP status codes (1xx–5xx).
Open - Convert
Programmer Calculator
Enter an integer and see it simultaneously in BIN, OCT, DEC, and HEX.
Open - Convert
Hash Generator
Hash text or raw bytes (hex) with MD5, SHA-1/2/3 — all digests at once.
Open
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