50+ tools for everyday coding. No signup. No ads. 100% client-side.
Format, validate, and beautify JSON with syntax highlighting. Minify, sort keys, and tree view.
Decode JSON Web Tokens. Inspect headers, payloads, expiration times, and standard claims.
Test regular expressions in real-time with match highlighting, capture groups, and cheatsheet.
Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes. Compare hashes side by side.
Encode and decode Base64 strings. Supports text, URL-safe mode, and file encoding.
Generate UUID v4 in single or bulk mode. Multiple formats: standard, no dashes, uppercase.
Build cron expressions visually. Plain English explanations, next 5 run preview, quick presets.
Encode and decode URLs. URI vs URIComponent mode explained. Handles special characters.
Curated collection of effective AI prompts for coding, writing, analysis, and more.
Grade your AI prompts. Get scores for clarity, specificity, context, and actionability.
Convert Unix epoch timestamps to dates and back. Live clock, auto-detect seconds vs milliseconds.
Complete HTTP status code reference. Search and filter all 1xx-5xx codes with descriptions.
Pick colors visually, convert between HEX, RGB, HSL. Color harmony and popular palettes.
Live Markdown editor with instant preview. Supports code blocks, tables, lists, and more.
Convert JSON arrays to CSV format. Handles nested objects, multiple delimiters, download support.
Generate strong, secure passwords with customizable length, character types, and entropy display.
Compare two texts side-by-side with highlighted differences. Supports ignore whitespace and case options.
Free REST APIs: URL shortener, paste service, website analyzer, email verifier, AI detector.
Convert between numeric and symbolic Unix file permissions. Visual checkbox interface with command preview.
Calculate network ranges, broadcast addresses, host counts, and subnet masks from CIDR notation.
Format and beautify SQL queries. Supports SELECT, INSERT, UPDATE, DELETE, CREATE TABLE with customizable indent and casing.
Generate placeholder text in paragraphs, sentences, or words. Optional HTML wrapping for quick mockups.
Convert special characters to HTML entities and back. Reference table of common entities included.
Convert between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more.
Bidirectional conversion between JSON and YAML formats with syntax validation and formatting.
Convert between bytes, KB, MB, GB, TB and binary units (KiB, MiB, GiB). Includes bits for network speeds.
Convert between binary, octal, decimal, hex and custom bases up to 62. With bit-level analysis.
Minify JavaScript to reduce file size or beautify for readability. Shows compression stats.
Complete ASCII reference with dec/hex/oct/binary. Character analyzer for any Unicode text.
Query A, AAAA, MX, NS, TXT, CNAME, SOA records for any domain. Powered by DNS-over-HTTPS.
Verify HTTPS certificate details, expiry date, issuer, chain of trust, and protocol support.
Inspect HTTP response headers, status codes, content types, and security header analysis.
Check domain registration details, expiry date, registrar, nameservers. Uses RDAP protocol.
Find geolocation, ISP, country, city, timezone, and organization for any IP. Check your own IP.
Convert HTML to clean Markdown syntax. Supports headings, links, images, lists, tables, code blocks.
Edit SVG code with live preview. Optimize file size by removing comments, metadata, and whitespace.
Decode and inspect JSON Web Tokens. View header, payload, and verify structure.
Visual CSS Grid builder with presets. Generate grid layouts and copy CSS code.
Visual Flexbox playground. Configure properties and generate CSS code.
Convert JSON arrays to CSV format. Handles nested objects and arrays.
Generate QR codes for URLs, WiFi, vCards, email, phone, and SMS.
Live Markdown editor with split-pane preview. Toolbar, export to HTML.
Create favicons from text, emoji, or images. Generate PNG files in all sizes (16x16 to 512x512).
Generate SEO meta tags, Open Graph, and Twitter Cards. Preview how your page looks in Google and social media.
Create linear, radial, and conic CSS gradients with live preview. 12 presets, multiple color stops.
Create CSS box shadows with live preview. Multiple layers, presets (soft, glow, neon, neumorphism).
Analyze on-page SEO: meta tags, headings, images, links, Open Graph, structured data. Get a score and recommendations.
Create a robots.txt file with user agents, allow/disallow rules, sitemap URL, and crawl delay settings.
Compress JPEG, PNG, WebP images in your browser. Adjust quality, resize, convert formats. 100% private.
Convert images to Base64 data URIs for embedding in HTML, CSS, or JSON. Supports all formats.
Create unique URLs, capture HTTP requests, inspect headers and body in real-time
Validate JSON data against a schema with detailed error messages
Create a beautiful link-in-bio page. Free Linktree alternative with themes
Estimate developer salary by role, experience, location, and skills
Searchable reference for every Git command you need
Complete searchable reference for all HTTP status codes
Searchable reference for Docker commands, Compose, and more
Complete Python reference with 100+ snippets โ syntax, data structures, OOP, and more
SQL reference with 90+ queries โ SELECT, JOIN, window functions, CTEs, and more
Essential terminal reference with 100+ commands โ files, processes, networking, and more
Regular expression reference with 60+ patterns, common recipes, and JS/Python examples
Modern JS reference with 120+ snippets โ ES6+, arrays, promises, DOM, fetch, and more
Modern CSS reference with 110+ properties โ Flexbox, Grid, animations, responsive design
๐ท87+ examples: types, generics, utility types, guards, mapped types
โ๏ธ49+ examples: useState, useEffect, useRef, React 19 hooks, custom patterns
๐ป87 examples: variables, loops, functions, text processing
โฐBuild, explain, and test cron schedules with presets
๐จHEX/RGB/HSL converter with contrast check and palettes
๐Visual Linux file permissions calculator with presets
๐11 cheat sheets with 900+ examples โ browse the full collection
Encode and decode Base64 strings. Text, file, and URL-safe modes.
Generate random UUID v4 identifiers. Bulk generation, multiple formats.
Write and preview Markdown in real-time. GitHub Flavored Markdown support.
Compare two JSON objects side by side. Deep diff with tree view, path display, and highlighted additions, deletions, modifications.
Convert between HEX, RGB, HSL, HSV, CMYK. WCAG contrast checker, palette generator, tints & shades, 148 named colors.
Compare two text blocks with Myers diff algorithm. Side-by-side, inline, and unified views. Character-level highlighting.
All tools run in your browser. No server processing, no waiting.
Your data never leaves your browser. No tracking, no analytics.
Easy on the eyes. Designed for developers who code at night.
Works on any device. Responsive design for phones and tablets.