Free Developer Tools
100% client-side tools for developers. No signup, no tracking, completely free.
All tools run entirely in your browser. Your data never leaves your computer.
Image Compressor
Compress JPEG, PNG, WebP images
Word Counter
Count words, characters, and sentences
Markdown Preview
Write and preview Markdown with real-time rendering, GitHub Flavored Markdown support, and syntax highlighting
Lorem Ipsum Generator
Generate placeholder text for designs
Diff Checker
Compare two texts and highlight differences instantly
Password Generator
Generate secure random passwords
Color Converter
Convert between HEX, RGB, HSL formats
QR Code Generator
Create QR codes for URLs, WiFi, contacts, email, SMS, and phone numbers. Customize colors and size, download as PNG or SVG.
JSON Formatter & Validator
Format, validate, and minify JSON instantly
JSON to CSV Converter
Convert between JSON and CSV formats
Timestamp Converter
Convert Unix timestamps to dates
Base64 Encoder/Decoder
Encode and decode Base64 strings
Cron Expression Builder
Build and validate cron schedule expressions
UUID/ULID Generator
Generate unique identifiers instantly
Regex Tester
Test and debug regular expressions
JWT Decoder
Decode and inspect JSON Web Tokens
Hash Generator
Generate MD5, SHA-256, SHA-512 hashes
URL Encoder/Decoder
Encode and decode URLs and query strings
JSON to YAML Converter
Convert JSON data to YAML format for configs, Docker, Kubernetes
YAML to JSON Converter
Convert YAML configs to JSON format for APIs and data exchange
XML to JSON Converter
Convert XML data to JSON format. Handles attributes, CDATA, and nested elements
XML to CSV Converter
Convert XML data to CSV spreadsheet format for Excel and Google Sheets
Twitter Character Counter
Count characters for Twitter/X posts with real-time tracking for URLs, mentions, and emojis
Hex to RGB Converter
Convert hex color codes to RGB, HSL, and CMYK values with live preview and CSS code generation
Slug Generator
Convert any text to clean, SEO-friendly URL slugs with transliteration, stop word removal, and bulk generation
ASCII Table & Generator
Complete ASCII reference table with all 128 characters. Search, filter, and convert text to ASCII codes instantly
Text to Binary Converter
Convert text to binary code and binary to text instantly with ASCII and UTF-8 encoding support
CSV to XML Converter
Convert CSV data to well-formatted XML with custom element names, attribute mode, and CDATA support
JSON to XML Converter
Convert JSON data to well-formatted XML with custom root elements, smart array handling, and type attributes
CSV to SQL Converter
Generate SQL INSERT, CREATE TABLE, and UPDATE statements from CSV data with auto type detection
JSON to TypeScript Converter
Generate TypeScript interfaces and types from JSON data with smart naming, union types, and configurable output
Student Email Signature Generator
Create professional email signatures for students with university, major, graduation year, social links, and multiple templates
Chmod Calculator
Calculate Linux file permissions with an interactive visual grid. Convert between octal (755) and symbolic (rwxr-xr-x) notation.
Markdown to HTML Converter
Convert Markdown syntax to clean HTML code with live preview. Supports headings, lists, tables, code blocks, and GFM extensions.
Base64 to Image Converter
Decode Base64 strings to viewable and downloadable images. Supports PNG, JPEG, GIF, WebP, SVG with auto-format detection.
Robots.txt Generator
Create robots.txt files with a visual editor. Add rules for search engines and AI bots, set crawl delays, and include sitemaps.
Bubble Text Generator
Convert your text to bubble letters (ⓑⓤⓑⓑⓛⓔ) instantly for social media, Discord, and more. Copy and paste bubble text anywhere.
Strikethrough Text Generator
Create crossed out text instantly for social media, Discord, and more. Copy and paste strikethrough text anywhere.
Upside Down Text Generator
Flip your text upside down instantly for social media, Discord, and more. Copy and paste flipped text anywhere.
Zalgo Text Generator
Create creepy glitch text with customizable chaos level instantly. Perfect for Discord, social media, and memes.
Small Text Generator
Convert your text to superscript, subscript, and small caps instantly for social media, Discord, and more. Copy and paste tiny text anywhere.
Morse Code Translator
Convert text to Morse code and Morse code to text instantly. Listen to audio playback with adjustable speed. Supports letters, numbers, and punctuation.
Chronological Age Calculator
Calculate your exact age in years, months, days, hours, minutes, and seconds. Find next birthday countdown and zodiac sign.
Korean Age Calculator
Calculate your Korean age, international age, and see the difference. Learn how the traditional Korean age system works.
Crontab Guru
Build, validate, and understand cron expressions with human-readable explanations and next scheduled run times. Interactive crontab editor for developers.
HTTP Status Codes Cheat Sheet
Complete HTTP status codes reference with descriptions, categories, and examples. Search and filter all 1xx-5xx response codes instantly.
Hex to Binary Converter
Convert hexadecimal to binary instantly with step-by-step nibble breakdown. Supports batch conversion and reverse binary to hex.
IP to Binary Converter
Convert IPv4 addresses to binary notation with octet breakdown, subnet visualization, and CIDR support.
Octal to Decimal Converter
Convert octal (base-8) numbers to decimal (base-10) instantly with step-by-step positional notation breakdown.
Decimal to Binary Converter
Convert decimal (base-10) numbers to binary (base-2) instantly with division-remainder breakdown and configurable bit padding.
Decimal to Octal Converter
Convert decimal (base-10) numbers to octal (base-8) instantly with step-by-step division breakdown and Unix permission reference.
Binary to Octal Converter
Convert binary (base-2) numbers to octal (base-8) instantly with step-by-step 3-bit grouping breakdown.
CSS to Tailwind Converter
Convert CSS properties to Tailwind CSS utility classes instantly with smart color mapping and arbitrary value support.
JSON to C# Class Generator
Generate C# classes from JSON data with proper types, nullable properties, and JsonProperty attributes.
JSON to Dart Converter
Generate Dart classes from JSON data with factory constructors, toJson methods, and null safety support.
Whitespace Remover
Remove extra whitespace, leading/trailing spaces, blank lines, and normalize spacing in your text instantly.
Remove Line Breaks
Remove line breaks from text online. Convert multi-line text to a single line with custom separator options.
CSV Viewer Online
View and explore CSV files in a sortable, searchable table. Paste or upload CSV data for instant visualization.
TSV to CSV Converter
Convert tab-separated values (TSV) to comma-separated values (CSV) instantly. Handles quoted fields and special characters.
JSON to PHP Array Converter
Convert JSON data to PHP array syntax instantly. Supports short and long array syntax, trailing commas, and variable assignment.
TypeScript to JavaScript Converter
Convert TypeScript to JavaScript instantly. Removes type annotations, interfaces, enums, and generics to produce clean JS output.
Backward Text Generator
Reverse your text instantly — character by character or word by word. Perfect for social media, puzzles, and fun messages.
Stripe Fee Calculator
Calculate Stripe processing fees and find out how much to charge to receive a specific amount after fees.
Etsy Fee Calculator
Calculate Etsy seller fees including listing, transaction, processing, and Offsite Ads fees. See your net profit per sale.
Random Emoji Generator
Generate random emojis by category. Pick from Smileys, Animals, Food, Activities, and more. Copy and paste instantly.
Text Repeater
Repeat any text or string multiple times with custom separators, numbering, and formatting options.
LinkedIn Font Generator
Create bold, italic, script, and fancy Unicode fonts for LinkedIn posts, profiles, and comments.
Bold Italic Text Generator
Convert text to bold, italic, or bold italic Unicode characters for social media, Discord, and more.
Double Discount Calculator
Apply two successive discounts to any price and see the final price, total savings, and combined discount percentage.
Triple Discount Calculator
Apply three successive discounts to any price and see the final price, total savings, and combined discount percentage.
eBay PayPal Fee Calculator
Calculate eBay final value fees, PayPal processing fees, and your net profit per sale. Supports multiple categories and payment methods.
Random Word Generator for Songs
Generate random songwriting words by theme with rhyme suggestions. Get instant lyric inspiration for any genre.
Cursed Text Generator
Create creepy, spooky, and weird cursed text with multiple styles. Perfect for Discord, social media, and memes.
Glitch Text Generator
Create glitchy, corrupted, and distorted text with multiple styles. Perfect for Discord, social media, and usernames.
Wingdings Translator
Translate text to Wingdings symbols and Wingdings to English. Supports Wingdings 1, 2, and 3 with Gaster Mode.
Audiobook Speed Calculator
Calculate how long an audiobook takes at different playback speeds. Compare 1x, 1.5x, 2x, and custom speeds instantly.
Playback Speed Calculator
Calculate how long any video, podcast, or lecture takes at different playback speeds. Compare watch times at 1x, 1.5x, 2x, and custom speeds.
Venmo Fee Calculator
Calculate Venmo fees for personal payments, business transactions, credit card sends, and instant transfers.
Underline Text Generator
Add underlines to your text using Unicode combining characters. Works on social media, Discord, and anywhere Unicode is supported.
Superscript Text Generator
Convert regular text to superscript Unicode characters instantly. Perfect for social media, math notation, and footnotes.
Number to Word Converter
Convert numbers to English words instantly. Supports integers, decimals, negative numbers, and currency formatting.
Invisible Character
Copy and paste invisible, blank, and empty Unicode characters for usernames, messages, and formatting tricks.
AI ASCII Art Generator
Convert any text to stunning ASCII art with 15+ font styles. Perfect for Discord, README files, and social media.
Global Days Calculator
Calculate the exact number of days between any two dates with business days, weekends, and detailed breakdown.
Markup Calculator
Calculate selling price, profit, and profit margin from cost and markup percentage instantly.
Cumulative GPA Calculator
Calculate your cumulative GPA from multiple semesters with credit hours, letter grades, and previous GPA support.
Depreciation Calculator
Calculate asset depreciation using Straight-Line, Declining Balance, Double Declining Balance, and Sum-of-Years' Digits methods.
Break-Even Calculator
Calculate your break-even point in units and revenue, contribution margin, and profit at any sales volume.
Gross Profit Calculator
Calculate gross profit, gross profit margin, and markup from revenue and cost of goods sold (COGS) instantly.
eBay Profit Calculator
Calculate your net profit from eBay sales after final value fees, payment processing, shipping, and cost of goods.
YouTube Tag Extractor
Extract tags, keywords, and metadata from any YouTube video URL to optimize your content strategy.
Instagram Character Counter
Count characters for Instagram captions, bios, comments, and Reels with real-time limit tracking.
MACRS Depreciation Calculator
Calculate MACRS depreciation for US tax purposes with GDS, ADS methods and full IRS schedules.
Cost Per Unit Calculator
Calculate cost per unit and compare pricing between products to find the best deal instantly.
CPC Calculator
Calculate cost per click, total ad spend, or number of clicks for your PPC advertising campaigns instantly.
Burn Rate Calculator
Calculate your startup's monthly burn rate, cash runway, and zero cash date instantly.
Click-Through Rate Calculator
Calculate CTR from clicks and impressions, find total clicks from a target rate, or determine impressions needed.
Cost Per Lead Calculator
Calculate your cost per lead (CPL) from campaign spend and leads generated. Includes channel benchmarks, CPA, and ROI analysis.
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