Code Tools Suite
10 essential developer utilities in one place — HTML/CSS/JS formatter & minifier, JSON beautifier, code diff checker, color converter, CSS gradient builder, number base converter, hash generator, JWT decoder, and character encoder. All browser-based, zero uploads.
This tool only decodes — it does not verify the signature. Never paste production secrets into any online tool.
Free Online Code Tools for Developers
10 essential developer utilities all in one suite. Every tool runs entirely in your browser — no code is ever sent to a server. Fast, private, and always available.
Code Formatter
Beautify and format HTML, CSS, JavaScript, and SQL with configurable indent size, line length, semicolons, quote style, and trailing commas.
Code Minifier
Minify HTML, CSS, and JavaScript to the smallest possible size. Shows exact byte savings and percentage reduction with a visual progress bar.
JSON Tools
Beautify, minify, validate, and sort JSON keys. Convert JSON to XML. Real-time validation with detailed error messages and structural analysis.
Code Diff
Side-by-side code diff with line-level changes, added/removed counters, similarity score, ignore whitespace and case options.
Color Converter
Convert colors between HEX, RGB, RGBA, HSL, HSLA, HSV, CMYK, CSS named colors. Shows shades, tints, WCAG contrast ratios and complementary colors.
CSS Gradient
Visually build linear, radial and conic CSS gradients. Unlimited color stops, angle control, repeating mode, presets and one-click CSS copy.
Number Base Converter
Convert numbers between decimal, binary, octal, hexadecimal, base 32, 36, and 64. Bit visualization and number properties (prime, power of 2, etc.).
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes using the Web Crypto API. Includes hash verification tool to compare against an expected value.
JWT Decoder
Decode and inspect JWT tokens — view header, payload, and signature. Shows algorithm, expiry, issued-at time, subject and issuer claims.
Char Encoder
Encode and decode text in Base64, URL encoding, HTML entities, Unicode escape sequences, ASCII codes, and Morse code.
More Developer & Code Tools
Explore 30 additional free developer utilities — curl converters, JSON tools, CSS generators, network calculators, and much more. All browser-based, zero data upload.
cURL Converter
Convert raw cURL commands into Python, JavaScript, PHP, Ruby, and Go HTTP request code snippets.
JSON Schema Generator
Auto-generate JSON Schema (draft-07) from a JSON sample for validation and documentation.
JSON to TypeScript
Convert JSON data into typed TypeScript interfaces and type declarations automatically.
CSS Flexbox Generator
Visually build CSS flexbox layouts with live preview and copyable CSS code.
Git Command Builder
Build and explore common Git commands with full flag explanations and examples.
chmod Calculator
Calculate Unix file permissions in numeric (chmod 755) and symbolic notation modes.
JSON Diff Tool
Compare two JSON documents side-by-side and highlight structural differences visually.
Glassmorphism Generator
Generate frosted-glass CSS effects with backdrop-filter, blur, and transparency controls.
SVG Path Editor
Visually compose SVG path commands and copy the resulting path data string.
String Escaper
Escape and unescape strings for JSON, JavaScript, HTML, CSV, and regex contexts.
Redirect Generator
Generate .htaccess, Nginx, and meta-refresh redirect rules for 301, 302, and 307 redirects.
Docker Run to Compose
Convert docker run CLI commands into docker-compose.yml YAML configuration files.
Keycode Info
Press any key to see its keyCode, key name, char code, and event properties in real time.
CSS Clamp Generator
Generate fluid responsive typography using the CSS clamp() function with min/max/preferred values.
SQL to JSON Converter
Convert SQL CREATE TABLE and INSERT statements into JSON structure and data arrays.
Bcrypt Generator
Generate and verify bcrypt password hashes with configurable salt rounds in your browser.
GraphQL Formatter
Format and beautify GraphQL queries, mutations, subscriptions, and schema definitions.
CSS Animation Builder
Visually build CSS keyframes animations with live preview and copyable CSS code.
Port Number Lookup
Search TCP and UDP port numbers, official IANA assignments, and common service names.
SVG to JSX
Convert SVG markup to React/Next.js JSX components with camelCase attribute transforms.
CSP Header Generator
Build Content-Security-Policy HTTP headers to protect against XSS attacks.
Robots.txt Generator
Generate SEO robots.txt files with User-agent, Disallow rules, and Sitemap URLs.
HTML Table Converter
Convert HTML <table> code to Markdown tables, JSON arrays, and CSV spreadsheets.
JS Object to JSON
Convert JavaScript object literals with unquoted keys into strict, valid JSON format.
Cron Descriptor
Translate cron expressions like "*/5 * * * *" into plain English schedule descriptions.
CSS Unit Converter
Convert between px, rem, em, percentage, and pt CSS units with custom base font size.
IPv4 CIDR Calculator
Calculate subnet mask, network IP, broadcast address, and usable host range from CIDR notation.
XML Formatter
Format, indent, validate, and beautify raw XML documents instantly in your browser.
Code Diff Checker
Side-by-side code diff visualizer with highlighted additions, deletions, and unchanged lines.
HTTP Status Codes
Complete reference guide for all HTTP 1xx, 2xx, 3xx, 4xx, and 5xx status codes with descriptions.
Fake Data Generator
Generate mock JSON, CSV & SQL datasets for software testing & UI prototypes.