Developer Tools

Format, beautify and validate JSON instantly online

Validate JSON syntax and find errors with line and column numbers

Test JSONPath queries against any JSON document, supports root, child, recursive descent, indices, and wildcards.

Convert JSON data to YAML format with proper indentation

Paste a raw API response and pretty-print it with 2-space indent, key sorting, byte size, key count and parse-error line info.

Compare two JSON documents and highlight differences

Generate JSON Schema from sample JSON data automatically

Paste JSON and explore it as a collapsible tree. See value types, array lengths, and copy any node's path or value in one click.

Decode HTML entities back to readable text instantly

Encode special characters as HTML entities for safe display

Format and beautify HTML code with proper indentation

Minify HTML by removing comments, whitespace, and unnecessary characters

Convert HTML markup to clean Markdown text instantly in your browser

Minify JSON by removing all whitespace and formatting

Convert Markdown text to clean HTML markup instantly in your browser

Format and beautify SQL queries with proper indentation

Convert TOML configuration files to clean, formatted JSON output

Format and beautify XML documents with proper indentation

Format and normalize YAML with consistent indentation

Convert YAML data to JSON format instantly in your browser, no upload needed

Build CSS keyframe animations with 10 presets, fade, slide, pulse, shake, bounce, spin, wiggle, pop, and tune duration, easing, count, direction.

Visual border-radius builder, independent corners, px or % unit, instant preview, copy-ready CSS.

Build any CSS box-shadow visually with sliders for offset, blur, spread, and color, with instant preview and copy-ready output.

Turn a min and max font size into a fluid CSS clamp() that scales with the viewport. Drag a viewport slider to preview the exact size at any width.

Build CSS filter chains visually, blur, brightness, contrast, saturate, hue-rotate, sepia, grayscale, invert, opacity, with live preview.

Build frosted-glass UI elements with backdrop-filter blur and saturation, live preview against a colorful gradient.

Build CSS text-shadow visually with sliders for offset, blur, color, and opacity, six presets covering subtle, classic, glow, retro, neon, emboss.

Drag two control points to shape a CSS easing curve, watch it animate live, and copy the cubic-bezier() value. Six presets including overshoot.

Build soft-UI neumorphic CSS with a live preview. Drag the shape to move the light source, tune distance and blur, and copy the box-shadow.

Build smooth wavy SVG dividers and section backgrounds, adjustable height, frequency, color. Copy or download the SVG.

Play with flex-direction, justify-content, align-items, wrap, and gap. Add or drop items, watch the layout shift live, then copy the container CSS.

Build a CSS grid visually. Set columns, rows, gaps, and fr/px/auto track sizes, watch the cells update live, then copy the grid CSS.

Build a pure-CSS loading spinner with no JavaScript or images. Pick a style, set the size, color, and speed, preview it live, and copy the CSS plus keyframes.

Paste plain CSS and get equivalent Tailwind utility classes back. Common properties map to named classes; anything else falls back to arbitrary values.

Build a pure-CSS triangle with the border trick. Pick a direction, set the size and color, and copy the ready-to-use code. Eight directions supported.

Convert a CSS length between px, rem, em, pt, %, vw and vh at once. Set your base and parent font-size plus viewport, see every unit live.

Build a CSS progress bar with sliders for value, height, and radius, plus color pickers and striped or animated stripe toggles. Copy the HTML and CSS instantly.

Generate smooth, random organic blob shapes as SVG. Tune the complexity and randomness, pick a color, regenerate until you like it, then copy or download.

Format and beautify CSS code with proper indentation

Minify CSS by removing comments, whitespace, and unnecessary characters

Build cron expressions visually, five fields, instant English description, common presets for every-minute through monthly schedules.

Paste a CSS selector and get its specificity as (a,b,c) with a full breakdown of which IDs, classes, and elements scored where.

Searchable git command cheat sheet grouped by task. Filter, click to copy, and grab the command you forgot.

Press any key and instantly see its event.key, event.code, keyCode, which, and modifier states. Live keydown inspector.

Share text or code via a short link. Set an expiry, add syntax, or burn it after one read.

Interactive ASCII character reference table with search and filtering

Interactive chmod permission calculator with octal and symbolic notation

Format and beautify JSON, HTML, CSS, XML, and SQL code with customizable indentation

Parse cron expressions and see human-readable schedules

Searchable reference of common HTML entities with click-to-copy

Complete reference of HTTP status codes grouped by class with search and filtering

Test and debug regular expressions with live highlighting

Parse and inspect URL components including query parameters

Decode Base64 encoded text back to plain readable text

Encode text to Base64 format with full Unicode support

Decode Base64 strings back to viewable images with preview

Convert images to Base64 data URLs for embedding in code

Generate signed JWT tokens with HMAC-SHA256 using Web Crypto API

Convert numbers between binary, octal, decimal, hexadecimal, and any base 2-36

Verify passwords against PBKDF2-SHA256 hashes in your browser

Hash passwords securely using PBKDF2-SHA256 with configurable iterations

Decode percent-encoded URLs and query strings back to readable text

Encode text for safe use in URLs using percent-encoding

Build a valid docker-compose.yml from a form. Add services, ports, env vars, volumes, depends_on, and restart policies, then copy or download.

Build a .gitignore by checking off templates for Node, Python, Go, Rust, macOS, VS Code, and more. Copy or download instantly.

Build an Apache .htaccess file with toggles for HTTPS, www redirects, error pages, IP blocks, gzip, cache headers, and custom rules.

Pick an open-source license, fill in your name and year, and get the full LICENSE text ready to drop in your repo.

Build an nginx server block from a form. server_name, SSL, reverse proxy, PHP-FPM, gzip, body limits, custom locations. Copy or download the .conf.

Visually build a SELECT query with columns, WHERE filters, JOIN, ORDER BY, and LIMIT. Strings get quoted for you. Copy ready.

Generate realistic fake data including names, emails, phones, addresses, and more

Generate placeholder lorem ipsum text with customizable paragraph and word counts

Generate compact, URL-friendly unique IDs with customizable length and alphabet

Generate lexicographically sortable, time-ordered ULID values

Perform bitwise operations (AND, OR, XOR, NOT, shifts) with multi-format results

Compare two texts and highlight differences line by line

Calculate network address, broadcast, subnet mask, and host range from IP/CIDR

Minify JavaScript by removing comments and whitespace while preserving string literals

Convert between Unix timestamps and human-readable dates

Upload a file and get a link to share it. Set an expiry up to 30 days and cap the number of downloads.

Paste JSON and get clean TOML back instantly. Handles nested tables, arrays of tables, and inline tables, all in your browser with nothing uploaded.

Instantly see your screen resolution, browser viewport, pixel ratio, and color depth. Resize the window and the viewport numbers update in real time.