Developer Tools

JSON, Base64, hash generators, regex testers — 34 tools available.

JSON Formatter

Format, validate, and beautify JSON with syntax highlighting.

Base64 Encoder / Decoder

Encode and decode Base64 strings instantly.

URL Encoder / Decoder

Encode or decode URL/percent-encoded strings.

HTML Encoder / Decoder

Convert special characters to HTML entities and back.

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Regex Tester

Test regular expressions with live match highlighting.

JWT Decoder

Decode and inspect JSON Web Token headers and payloads.

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JWT Encoder

Sign a JSON Web Token with a secret key, for testing APIs.

UUID Generator

Generate v1 and v4 UUIDs and GUIDs in bulk.

Hash Generator

Generate MD5, SHA1, SHA256, and SHA512 hashes.

Color Converter

Convert colors between HEX, RGB, HSL, and CMYK formats.

Unix Timestamp Converter

Convert Unix timestamp to human-readable date and vice versa.

JSON to CSV Converter

Convert JSON arrays to CSV format instantly.

CSV to JSON Converter

Convert CSV files or text to JSON format.

Markdown Previewer

Write Markdown and preview the HTML output live.

HTML Formatter

Beautify and format messy HTML code.

Number Base Converter

Convert numbers between Binary, Octal, Decimal, and Hex.

HTTP Status Codes

Look up HTTP status codes and their meanings.

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Subnet / CIDR Calculator

Calculate network address, broadcast address, subnet mask, and usable host range from an IP and CIDR prefix.

JSON to XML Converter

Convert JSON data to XML format instantly.

SQL Formatter

Beautify and format SQL queries for readability.

CSS Formatter

Beautify and minify CSS code.

JS Minifier

Minify JavaScript code to reduce file size.

Cron Expression Generator

Build and validate cron job schedules visually.

HTML to Markdown

Convert HTML content to clean Markdown format.

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Markdown to HTML

Convert Markdown to clean HTML, with a live preview.

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YAML Formatter

Format, validate, and convert YAML to and from JSON.

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JSON Diff Checker

Compare two JSON payloads and see exactly what was added, removed, or changed.

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Color Contrast Checker

Check WCAG color contrast ratios for accessible text and backgrounds.

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JSON to TypeScript

Convert JSON data into TypeScript interfaces instantly.

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HTTP Header Checker

Inspect the HTTP response headers returned by any URL.

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WHOIS Lookup

Look up domain registration, registrar, and expiry details for any domain.

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DNS Lookup

Look up A, AAAA, MX, TXT, NS, and CNAME records for any domain.

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User-Agent Parser

Parse a User-Agent string into browser, version, OS, and device type.

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Chmod Calculator

Convert Unix file permissions between checkboxes, octal (755), and symbolic (rwxr-xr-x) notation.