Tools for Developers

Paste messy JSON, get it formatted and syntax-highlighted instantly. Validate, minify, or prettify.

Write and test regular expressions with live matching, capture groups, and match highlighting.

Encode text to Base64 or decode Base64 back to text. Supports UTF-8 and URL-safe variants.

Write markdown on the left, see it rendered live on the right.

Encode special characters for URLs or decode percent-encoded strings.

Compare two texts side by side. See additions, deletions, and unchanged lines.

Generate cryptographically secure v4 UUIDs. Bulk generate up to 100 at once.

Paste JSON array data, get a clean readable table. Great for sharing API data.

Convert between Unix timestamps and human-readable dates. Live clock included.

Compress CSS by removing whitespace, comments, and unnecessary characters.

Convert special characters to HTML entities or decode entities back.

Convert between binary, decimal, hexadecimal, and octal. Live.

Upload an image, get Base64 string, HTML img tag, and CSS background.

Build cron expressions visually. See human-readable schedules and next 5 run times.

Build and send HTTP requests. Test REST APIs directly from your browser.

Format and beautify SQL queries instantly with syntax highlighting.

Validate JSON data against a JSON Schema. See detailed validation errors.

Build .env files fast. Templates for Node, Next.js, Django, Rails, Docker, AWS.

Convert Markdown to clean, semantic HTML. Copy and use anywhere.

Convert JSON arrays to CSV format. Flatten nested objects, download as .csv.

Convert CSV data to JSON arrays. Auto-detects headers and data types.

Convert any text into a clean, URL-safe slug. Live as you type.

Generate SEO meta tags, Open Graph, and Twitter Cards. Copy the HTML.

Calculate Unix file permissions. Convert between numeric and symbolic notation.

Complete HTTP status code reference. Search by code or description.

Interactive regex reference. Search patterns, see examples.