Developer Tools

AI Token Counter →

Count the tokens in your text and estimate the API cost across GPT, Claude and Gemini…

Android AssetLinks JSON Generator - App Links →

Android AssetLinks JSON Generator files for Android App Links. Configure package names and SHA-256 fingerprints for…

Base32 Encoder/Decoder →

Free Base32 encoder and decoder tool. Encode or decode Base32 strings online. 100% client-side, instant, and…

Base58 Encoder/Decoder →

Free Base58 encoder and decoder tool. Encode or decode Base58 strings like Bitcoin addresses. 100% client-side,…

Base64 Encoder and Decoder →

Base64 Encoder and Decoder - Convert text strings into Base64 format or decode Base64 back to…

BBCode to HTML Converter →

Generate standard semantic HTML arrays translating classic forum BBCode syntax cleanly explicitly mappings independently beautifully naturally…

Chmod Calculator →

Chmod Calculator - Build Linux chmod permissions visually - read/write/execute for owner, group, public, plus setuid,…

Coin Flip →

Free Coin Flip Online streaks, batch 10 000 flips, and optional crypto-grade RNG. Full history, CSV…

Convert ASCII to Binary →

Convert ASCII to Binary tool. Convert text to binary and binary to text. 100% client-side, instant,…

Convert Base64 String Encoder and Decoder →

Encode text to Base64 or decode Base64 back to readable text, with full UTF-8 support. Free…

Convert Binary to Hex →

Convert Binary to Hex tool. Convert binary numbers to hex instantly. 100% client-side, instant, and secure.

Convert BSON to JSON →

Convert MongoDB BSON hex dumps to readable JSON in your browser. Free, offline, client-side - full…

Convert Curl to Fetch →

Convert cURL to fetch/axios/node-fetch with TypeScript option. Handles auth, cookies, JSON body without double-encoding. Free, offline,…

Convert Curl to Php Curl →

Convert cURL to PHP curl_setopt() code. Auto-POST detection, JSON-safe parsing, basic auth, cookies, multipart. Free, offline,…

Convert Curl to Python Requests →

Convert cURL to Python requests/httpx/aiohttp. JSON-safe, auth, cookies, multipart. Free, offline, client-side, instant, secure.

Convert Excel to HTML Table →

Convert .xlsx, .xls, or .csv to clean HTML table - headers, borders, striped rows, Bootstrap. Free,…

Countdown Timer →

Countdown timer with presets, pause, audio alert, shareable URL. Free, client-side, instant, secure.

Cron Parser Next Runs →

Calculate next cron job runs. POSIX dom/dow semantics, @yearly/@monthly/@weekly macros, timezones, human-readable description. JSON/CSV/ICS export. Free.

Crontab Generator →

Build cron schedules visually - POSIX-correct, named macros, custom field input, impossible-schedule detection, Quartz-syntax warnings. Free,…

Csharp Class from JSON →

Convert JSON to C# class - records or classes, JsonPropertyName (System.Text.Json or Newtonsoft.Json), init-only setters, required…

CSS Animation Generator →

Generate CSS @keyframes animations - 16 presets, full duration/timing/delay/direction/fill controls, prefers-reduced-motion wrapper. Live preview. Free.

CSS Aspect Ratio →

Generate CSS aspect-ratio with padding-top fallback, object-fit options, 16+ presets, decimal input. Live preview. Free, client-side.

CSS Beautifier →

Beautify or minify CSS with proper nested @media/@keyframes/@supports handling, comment preservation, calc()/var() awareness. Free, client-side.

CSS Border Radius Generator →

Visual CSS border-radius with elliptical mode, 6 unit types (px/%/em/rem/vw/vh), 8 shape presets, live preview. Free,…

CSS Clip Path Generator →

Visual clip-path builder - polygon / circle / ellipse / inset / path, 20+ presets, custom…

CSS Columns Generator →

Generate CSS multi-column layout with column-count or column-width, gap, rule, fill, span, break-inside. Live preview. Free,…

CSS Cursor Generator →

Browse 34 CSS cursors organized by category, with custom URL cursor builder. Live hover preview. Free,…

CSS Filter Generator →

Generate CSS filter with 10 functions including drop-shadow, backdrop-filter mode, 8 preset combinations. Live preview with…

CSS Flexbox Generator →

Visual flexbox builder with container + per-item controls (flex-grow/shrink/basis/order/align-self) and 6 layout presets. Free, offline, client-side,…

CSS Glassmorphism Generator →

Visual frosted-glass CSS builder. 9 controls including backdrop-saturate, 6 presets, 4 background scenes to test against.…

CSS Gradient Generator →

Visual gradient builder with 6 types (linear, radial, conic + 3 repeating). 8 presets, random generator.…

CSS Grid Generator →

Visual CSS Grid builder with grid-template-areas, auto-fit + minmax responsive tracks, per-item spans. 6 presets. Free,…

CSS Media Query Generator →

Build @media queries: width, dark mode, reduced-motion, hover, pointer, orientation, print. Free, offline, client-side, instant.

CSS Minifier →

Context-aware CSS minifier preserves calc() spaces and string literals. Aggressive mode strips zero units, shortens hex.…

CSS Minifier Formatter →

Two-way CSS minifier and beautifier. Context-aware - respects calc(), data URLs, pseudo-selectors. Free, offline, client-side, instant.

CSS Neumorphism Generator →

Visual soft UI (neumorphism) CSS builder. 4 types: flat, inset, concave, convex. HSL-aware shadows that work…

CSS Outline Generator →

Visual CSS outline builder with :focus-visible mode, negative offset, currentColor, accessibility presets. Free, offline, client-side, instant.

CSS Spacing Generator →

Visual margin and padding editor with shorthand optimization, units (px/rem/em/%), auto margins, design-system presets. Free, client-side,…

CSS Sprite Generator →

Combine PNG/JPG/WebP/SVG into a CSS sprite sheet with vertical/horizontal/grid packing, 2x retina, drag-to-reorder. Free, offline, client-side.

CSS Transform Generator →

Visual CSS transform builder - 2D + 3D rotate, scale, skew, translate, transform-origin, perspective. Identity-omit optimization.…

CSS Unit Converter →

Convert between 23 CSS units (px/em/rem/pt/%/ch/vmin/vmax/dvw/cqw…) with property context + comparison table. Free, offline, client-side, instant.

CSS Variable Generator →

Generate CSS custom properties with scope selector, dark/light theme pair, SCSS/Less/JSON design-token exports. Free, offline, client-side,…

Dice Roller →

Roll d4-d100 with dice notation (3d6+2), advantage/disadvantage, keep-highest. Crypto.getRandomValues for unbiased rolls. Free, offline, client-side, instant,…

Diff Checker →

Side-by-side or unified text diff with word-level highlighting, ignore-whitespace/case toggles, .patch download. LCS-based. Free, offline, client-side,…

Docker Compose Generator →

Generate docker-compose.yml for Node, Postgres, MySQL, MongoDB, Redis, NGINX, MailHog, Adminer with healthchecks and Compose-spec. Free,…

Epoch Converter →

Convert Unix epoch timestamps to dates and dates to epoch - seconds or milliseconds, ISO/UTC/Local, relative…

Go Struct from JSON →

Generate typed Go structs from a JSON sample, with exported field names and json struct tags.

Google Fonts Pairings →

Browse curated Google Fonts pairings with a live preview and ready-to-use CSS to copy.

Gradient Generator →

Build a linear or radial CSS gradient with multiple color stops, copy the CSS, and download…

Htaccess Redirect Generator →

Generate Apache .htaccess redirect rules, 301 or 302, from a simple list of old and new…

HTML Beautifier →

Beautify HTML with clean indentation that reveals the nesting, right in your browser.

HTML Editor with Live Preview →

Write HTML and see it render live next to your code, then copy your markup.

HTML Entity Encode Decode →

Encode text into HTML entities or decode HTML entities back into text, with an encode-all option.

HTML Minifier →

Minify HTML by removing comments and collapsing whitespace between tags, with the size saving shown.

HTML Table Generator →

Generate a clean HTML table with the rows, columns, and optional header row you choose.

HTML Tag Stripper →

Strip HTML tags from a snippet and keep just the text, with entities decoded back to…

HTML to JSX Converter →

Convert HTML into JSX for React, renaming class and for and self-closing void tags.

IP Subnet Calculator →

Calculate the details of an IPv4 subnet from CIDR notation, including netmask, broadcast, and host range.

JSON Diff →

Compare two JSON values and see exactly what changed, listed by path.

JSON Escape and Unescape →

Escape text into a JSON string, or unescape a JSON string back into plain text.

JSON Flattener →

Flatten nested JSON into a single level, using dot-notation keys for every nested value.

JSON Formatter and Validator →

Format, validate, and minify JSON with a 2-space, 4-space, or tab indent, right in your browser.

JSON Key Sorter Online →

Sort the keys of a JSON object alphabetically, recursively through every nested object.

JSON Path Finder →

List every value in a JSON document with its full path in dot and bracket notation.

JSON to GraphQL Schema →

Generate a GraphQL schema from a JSON sample, with types inferred and nested objects as their…

JSON to Java POJO →

Generate Java POJO classes from a JSON sample, with field types inferred and nested objects as…

JSON to PHP Array →

Convert JSON into an equivalent PHP array literal, using modern short array syntax.

JSON to SQL Insert Generator →

Generate SQL INSERT statements from a JSON array of objects, with values safely quoted.

JSON to TOML →

Convert a JSON object into TOML, with top-level values as pairs and nested objects as tables.

JSON to TypeScript Interfaces →

Generate TypeScript interfaces from a JSON sample, with nested objects becoming named interfaces.

JSON Viewer (Tree) →

View JSON as a collapsible tree you can expand and collapse to explore the data.

JSONPath Tester →

Test a JSONPath expression against your JSON and see every matching value.

LLM API Pricing Comparison →

Compare API prices per million tokens across GPT, Claude and Gemini, sortable and searchable. Prices as…

MAC Address Generator →

Generate random MAC addresses with your choice of separator, letter case, and locally administered bit.

Nginx Config Generator →

Generate a clean Nginx server block from your domain, root, port, and a few toggles.

Online Stopwatch →

A simple, precise online stopwatch with start, stop, reset, and lap times.

Pomodoro Timer →

A Pomodoro timer with custom work and break lengths that switches phases automatically.

Properties to JSON →

Convert a Java .properties file into JSON, turning each key=value line into a JSON field.

Punycode Converter →

Convert internationalized domain names between Unicode and Punycode in either direction.

PX to REM Converter →

Convert pixel values to rem units based on a root font size you choose, many at…

Regex Cheat Sheet →

A searchable quick reference for regular expression tokens, with what each one matches.

Regex Generator →

Generate a ready-made regular expression for common patterns like email, URL, and date.

Regex Generator from Text →

Generate a regular expression from example text, generalizing digits, letters, and spaces.

Regex Tester →

Test a regular expression against your text, with flags, and see every match.

REM to PX Converter →

Convert rem values to pixels based on a root font size you choose, many at once.

Slug Generator →

Turn a title or phrase into a clean URL slug, lowercased with accents removed.

SQL Formatter →

Format SQL for readability, uppercasing keywords and putting the main clauses on their own lines.

SQL INSERT Generator →

Build SQL INSERT statements from a table name, a column list, and rows of comma-separated values.

SQL Minifier →

Minify SQL by stripping comments and collapsing whitespace into single spaces.

SQL to JSON Converter →

Convert SQL INSERT statements into JSON, with numbers, booleans, and null detected automatically.

Tailwind to CSS Converter →

Translate common Tailwind CSS utility classes into plain CSS declarations.

Tokens to Words Converter →

Convert between tokens, words and characters for AI prompts using standard ratios. Runs in your browser,…

TOML to JSON Converter →

Convert TOML configuration with tables, key-value pairs, and arrays into JSON.

URL Encode and Decode →

Encode text for safe use in URLs, or decode percent-encoded text back to plain text.

URL Parser →

Break a URL into its protocol, host, port, path, query parameters, and fragment.

XML to CSV Converter →

Convert repeated XML records into CSV, with the first record setting the columns.

YAML to XML Converter →

Convert YAML with nested mappings and lists into clean, nested XML.