Developer Tools, Built for Speed

Beautify, minify, and validate JSON online with syntax highlighting and error line detection. Free, 100% client-side — your data never leaves your browser.

Validate JSON data against a JSON Schema online. Check required fields, types, enums, ranges, string lengths, patterns, arrays, and additional properties. Free and client-side.

Format, validate, and convert YAML online. Pretty-print with 2 or 4-space indentation, check syntax, and convert between YAML and JSON. Free, 100% client-side — your data never leaves your browser.

Beautify, minify, and validate XML online. Pretty-print with 2 or 4-space indentation, strip whitespace for compact output, and check well-formedness. Free, 100% client-side — your data never leaves your browser.

Format and beautify SQL queries online with syntax highlighting. Supports MySQL, PostgreSQL, SQL Server, Oracle, BigQuery, Snowflake and more. Free, 100% client-side.

Format and minify CSS online. Beautify stylesheets for readability or compress CSS for smaller files. Free, fast, and client-side.

Format and minify JavaScript online. Beautify compact scripts or remove comments and whitespace for quick sharing. Free and client-side.

Parse, validate, and format .env environment files online. Detects duplicate keys, invalid syntax, and formatting issues — 100% client-side, your data never leaves your browser.

Validate and inspect docker-compose.yml files instantly. Checks syntax, service dependencies, port formats, and common mistakes — 100% client-side, your config never leaves your browser.

Format, validate, and generate Nginx configuration files online. Includes templates for static sites, reverse proxies, PHP-FPM, and HTTPS redirects. Free, 100% client-side — your config never leaves your browser.

Optimize, minify, and clean SVG files online. Removes Inkscape and Illustrator metadata, comments, empty groups, and unnecessary attributes. Preview the result instantly — free, 100% client-side.

Format, validate, and preview CSV files online. Auto-detects delimiter, checks column consistency, and converts to Markdown tables — 100% client-side, your data never leaves your browser.

Encode text, images, and files to Base64 or decode Base64 strings — free, online, and 100% client-side. No upload required.

Convert images to Base64 data URIs or decode Base64 strings back to images — free, online, 100% client-side. Supports PNG, JPEG, GIF, WebP, SVG, and more.

Encode or decode URLs and query strings with automatic query string parsing. Free, online, 100% client-side — no signup required.

Encode HTML special characters to entities or decode HTML entities back to text — free online tool, prevents XSS, 100% client-side.

Convert YAML to JSON and JSON to YAML online. Useful for configuration files, APIs, Kubernetes manifests, Docker Compose, and CI workflows. Free and client-side.

Convert XML to JSON and JSON to XML online. Parse attributes, text nodes, nested objects, and arrays for API debugging and data migration. Free and client-side.

Convert JSON arrays to CSV or CSV to JSON instantly — free online converter with download support. Handles quoted fields, 100% client-side.

Convert Unix timestamps to human-readable dates and back. Live ticking current timestamp. Supports timezones, milliseconds, and ISO 8601. Free and 100% client-side.

Convert numbers between binary, octal, decimal, and hexadecimal instantly — free online tool, 100% client-side, supports up to 64-bit values.

Convert colors between HEX, RGB, RGBA, HSL, and HSLA formats instantly — free online tool with color picker and preset swatches. 100% client-side.

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files online. Verify file checksums. Free, 100% client-side — nothing is uploaded.

Generate strong, random passwords using the Web Crypto API — fully client-side, never stored, customizable length and character sets.

Decode and inspect JWT tokens online. View header, payload claims, and expiry status instantly. 100% client-side — your token never leaves your browser.

Generate signed JWT tokens online. Choose HS256, RS256, ES256, and more. Add standard and custom claims, set an expiry, and copy the signed token instantly. 100% client-side.

Test and debug regular expressions with live match highlighting, group extraction, and a common patterns library. Free, 100% client-side regex tester.

Compare two texts or code snippets and see exactly what changed — line-by-line diff with color highlighting, free and 100% client-side.

Convert text between camelCase, PascalCase, snake_case, kebab-case, SCREAMING_SNAKE_CASE, Title Case, and more — free, instant, 100% client-side.

Count words, characters, sentences, paragraphs, and reading time instantly — free online word counter with top word frequency analysis. 100% client-side.

Preview Markdown in real time and copy the rendered HTML — supports GitHub Flavored Markdown with tables, code blocks, and more. Free, 100% client-side.

Generate Lorem Ipsum placeholder text by paragraphs, sentences, or words — free, instant, download as TXT. 100% client-side.

Preview meta tags for search results and social sharing. Generate title, description, Open Graph, and Twitter Card tags for SEO. Free and client-side.

Generate formatted Markdown tables with custom columns, rows, and alignment. Supports GitHub Flavored Markdown (GFM). Import existing tables, export as Markdown or HTML. Free and 100% client-side.

Complete regex cheatsheet with interactive examples. Covers anchors, quantifiers, groups, character classes, lookaround, and common patterns for email, URL, IPv4, and more. Test patterns directly in the browser.

Generate UUID v1, v4, or v7 (GUID) online — up to 10,000 at once. Export as TXT or CSV. 100% client-side, free, no signup required.

Generate QR codes instantly from any text or URL. Customize size, error correction, and colors. Download as PNG or SVG. Free, 100% client-side — nothing is uploaded.

Parse and understand cron expressions instantly. Get a human-readable description and the next 5 scheduled run times. Free, 100% client-side.

Validate cron expressions instantly. Get a plain-English description and the next 5 scheduled run times in any timezone. Free, 100% client-side.

Parse URLs online into protocol, host, hostname, port, path, query parameters, hash, and origin. Useful for debugging links, redirects, and tracking parameters.

Parse user agent strings online. Detect browser, operating system, rendering engine, and device type from a UA string. Free and client-side.

Complete reference of all HTTP status codes with full descriptions. Search and filter 1xx, 2xx, 3xx, 4xx, and 5xx codes instantly. Free, client-side, no signup required.

Calculate Unix file permissions online. Instantly convert between octal (755), symbolic (rwxr-xr-x), and checkbox views. Includes common presets and a Unix command preview.

Compress and resize images in your browser. Supports JPEG, PNG, and WebP. See before/after previews, file size savings, and download instantly. 100% client-side — your images never leave your device.

Calculate the exact difference between two dates or times — in days, hours, minutes, and seconds. Convert datetimes across 30+ timezones with a world clock view. Free, 100% client-side.

Test and evaluate JSONPath expressions against JSON data online. Supports $..deep, filters, array slices, and all standard JSONPath operators — free, 100% client-side.

Evaluate XPath 1.0 expressions against XML documents in your browser. Supports nodesets, strings, numbers, booleans, and all standard XPath axes — free, client-side.

Parse and analyze HTTP request or response headers online. Categorizes headers, checks for missing security headers, and explains each field — free, client-side.

Trace the full redirect chain for any URL — see every 301, 302, 307 hop, the final destination, and detect redirect loops. Free online tool.

Look up DNS records for any domain — A, AAAA, MX, TXT, CNAME, NS, SOA, and CAA records. Uses Cloudflare DNS (1.1.1.1) for fast, accurate results.

Check SSL/TLS certificate details, expiry dates, and coverage for any domain using certificate transparency logs. Free online tool.