Developer Tools
Tools for developers — JSON, regex, encoders, converters.
JSON Formatter & Validator
Format, validate and beautify JSON data with syntax highlighting.
JSON to CSV Converter
Convert JSON arrays to CSV files — perfect for spreadsheets.
Regex Tester & Visualizer
Test regular expressions with real-time match highlighting.
JSON to YAML Converter
Convert JSON to YAML and vice-versa. Useful for config files and Kubernetes manifests.
Base64 Encoder / Decoder
Encode text or decode Base64 strings online.
URL Encoder / Query String Parser
Encode/decode URLs, parse query strings to tables, and reverse them back.
Image to Base64 Converter
Drop an image and get a Base64 data URL, raw base64, or <img>/CSS snippet.
JSON Schema Validator
Validate any JSON document against a JSON Schema (draft-07 subset).
JWT Decoder
Decode and inspect JSON Web Tokens — header, payload, signature and timestamp claims.
Unix Timestamp Converter
Convert between Unix epoch seconds/milliseconds, ISO 8601, RFC 2822 and local/UTC times.
Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes for text or files. All computation local.
URL Parser & Query String Builder
Parse any URL into its components and rebuild query strings — 100% offline.
SQL Formatter & Minifier
Pretty-print or compress SQL queries — supports major dialects, runs in your browser.
Cron Expression Parser
Translate a 5-field cron expression into plain language, with breakdown and next-5-fire-times preview.
JavaScript / CSS Minify & Beautify
Quick-tokenize and either compress or re-indent JavaScript / CSS source. Runs in the browser.
XLSX to Markdown
Convert Excel (.xlsx) spreadsheets to Markdown tables — multi-sheet support, optional header detection, in-browser.