Developer tools
JSON, regex, Markdown — utilities for working with code and structured data.
JSON Formatter
Beautify, minify, and validate JSON in your browser. Live updates, copy with one click — nothing leaves your device.
Open →Regex Tester
Build, test and debug JavaScript regular expressions with live highlighting, replace mode and ready-to-use presets.
Open →Markdown Preview
Write Markdown on the left, see the rendered HTML on the right. Live preview, GFM support, copy as HTML.
Open →SQL Formatter
Beautify SQL queries with dialect-aware rules. Standard SQL, PostgreSQL, MySQL, BigQuery, T-SQL and SQLite — all in your browser.
Open →JSON ↔ CSV Converter
Turn a JSON array into clean CSV (or vice-versa). Pick a delimiter, flatten nested objects with dot-notation, toggle the header row.
Open →JSON ↔ YAML Converter
Round-trip between JSON and YAML in your browser — perfect for Kubernetes, GitHub Actions, Helm and CI configs.
Open →Markdown Table Generator
Edit a spreadsheet-style grid and get clean Markdown, HTML or AsciiDoc tables. Paste straight from Excel — we'll detect the cells.
Open →Gitignore Generator
Pick your stack, OS, and editor and get a clean, deduplicated .gitignore in a click.
Open →Cron Expression Generator & Explainer
Build cron expressions visually field-by-field, or paste an existing one to get a plain-English explanation and the next five run times.
Open →JSON to TypeScript / Go / Rust
Paste any JSON sample. Get clean TypeScript interfaces, Go structs, or Rust types with serde tags — fast, lightweight, and ready to paste into your code.
Open →JSON to JSON Schema Generator
Paste a JSON sample, get a JSON Schema (Draft 2020-12 or Draft 7) with auto-detected formats and a required field list.
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