Developer tools
Free online developer tools tools running 100% in your browser.
JSON Formatter & Validator
Format, beautify, minify, and validate JSON data with syntax highlight.
Base64 Encoder / Decoder
Convert text or files to Base64 and decode Base64 back to plain text.
JWT Debugger & Decoder
Decode and inspect JSON Web Token Header, Payload, Claims and expiry.
UUID / GUID Generator
Generate random, cryptographic v4 UUIDs individually or in bulk.
Regex Tester & Matcher
Test JavaScript regular expressions with real-time match highlighting and flags.
Hash Generator (SHA-256, MD5)
Compute cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) for any text.
CSV to JSON Converter
Convert tabular CSV data into clean, structured JSON format with 1 click.
JSON to CSV Converter
Flatten and export JSON array records into downloadable CSV spreadsheet files.
Cron Expression Parser & Humanizer
Translate 5-part cron expressions into plain human-readable sentences and calculate the next 5 scheduled execution timestamps.
Markdown Editor & Live Previewer
Write GitHub-flavored markdown with split-screen real-time rendering. Format tables, code blocks, checklists, and export raw HTML or download .md files.
HTML Entity Encoder & Decoder
Convert special characters into HTML entities (named, decimal, hex) to prevent XSS attacks, or decode encoded HTML strings back to readable Unicode text.
Color Shades & Palette Generator
Generate 11-step Tailwind color ramps (50-950), test WCAG accessibility contrast ratios, create harmonies (complementary, triadic), and export CSS/Tailwind code.
CSS Gradient Generator & Mesh Studio
Create stunning linear, radial, and conic CSS gradients with multi-color stops, curated presets, interactive angle dials, and 1-click CSS/Tailwind code export.
SQL Formatter & Beautifier Online
Format, indent, beautify, or minify complex SQL queries (PostgreSQL, MySQL, SQLite, Oracle, BigQuery). Standardize uppercase keywords and tab spacing.
CSS Box Shadow & Neumorphism Generator
Visual multi-layer CSS box-shadow and soft UI Neumorphism generator. Customize blur, spread, offsets, opacity, inset shadows, and export clean CSS or Tailwind classes.
Bulk UUID / GUID Generator Online
Generate up to 500 cryptographically secure UUIDs (v4, v7 Unix-epoch time-ordered, v1, nil). Customize uppercase, braces, hyphens, and export to JSON, CSV, or SQL.