Explore all 149 tools
AI Prompt Builder & Optimizer
Build structured prompts for ChatGPT, Claude, Midjourney. Role, tone, format controls. Free and instant.
AI Token Counter & Cost Estimator
Count tokens, estimate API costs for 12 models.
Age Calculator
Calculate exact age in years, months, and days.
Aspect Ratio Calculator
Aspect ratio calculator. YouTube, Instagram, TikTok presets.
BMI Calculator
Check your Body Mass Index instantly with WHO classification. Metric & imperial units, privacy-first.
BPM Tap Tempo
Tap tempo BPM finder. Tap button or press spacebar.
Barcode Generator
CODE128, EAN-13, UPC barcodes. Download SVG/PNG.
Base64 Encoder & Decoder
Encode and decode Base64 strings. Essential developer utility.
Body Fat Calculator
US Navy body fat % formula. Gender-specific, fitness assessment.
CSS Border Radius Generator
Generate border-radius visually. Control each corner individually. px or %. Copy CSS.
CSS Box Shadow Generator
Design box shadows visually. Adjust offset, blur, spread, color. Live preview. Copy CSS.
CSS Clamp Generator
Generate CSS clamp() for fluid typography and spacing. Min, preferred, max. Copy instantly.
CSS Minifier
Minify and compress CSS. Strip whitespace, remove comments, reduce file size.
CSV ↔ JSON Converter
CSV ↔ JSON converter. Smart parsing with PapaParse.
Calorie & TDEE Calculator
Daily calorie needs, TDEE, macros. BMR calculation.
Canonical Tag Checker
Check canonical URLs on any page. Detect missing tags, mismatches, and self-referencing canonicals.
Case Converter
UPPER, lower, camelCase, snake_case, 8 formats.
Centimeters to Inches Converter
Convert cm to inches instantly. Free, accurate, no signup.
Coin Flip
Flip a virtual coin — heads or tails. True 50/50 via crypto.getRandomValues(). Single or batch mode up to 100 flips.
Color Blindness Simulator
Color blindness simulator. 4 types, Canvas LMS matrix.
Color Code Converter
Convert HEX to RGB and HSL. Pick colors and copy codes.
Color Contrast Checker
Check WCAG color contrast ratios. AA/AAA compliance for normal and large text. Free, instant, no upload.
Color Palette Generator
Complementary, analogous, triadic, monochrome palettes.
Compound Interest Calculator
See how your money grows with compound interest. Charts.
Countdown Timer
Set a date and time, get a live countdown. Embeddable.
Country Code Lookup
Look up ISO alpha-2, alpha-3, dialing codes, country TLDs, and currency codes for 250 countries. Search, sort, and copy with one click.
Cron Expression Builder
Visual cron builder. Human-readable. Presets included.
Cups to Milliliters Converter
Convert cups to ml instantly. Perfect for cooking and baking.
Currency Converter
Live exchange rates. Frankfurter API, 7-day chart.
DCA Calculator
Dollar Cost Averaging. Add buys, see real average cost.
DPI & PPI Calculator
Calculate screen pixel density. For designers and developers.
Date Difference Calculator
Days between dates. Business days, years, weeks.
Dead Pixel Test
Full-screen color test for your screen. No ads during the test.
Decibel Meter
Measure sound levels. Great for classrooms and events.
Decision Wheel
Spin the wheel with custom options. Fair, fast, and free.
Dice Roller
Roll virtual dice with realistic animation. d4 to d100, multiple dice, history tracking. Free, no sign-up.
Discord Link Preview
Preview how your link appears as a Discord embed. Colored sidebar, title, description, inline image. Free preview tool.
Distance Calculator
Calculate straight-line distance between any two points on Earth. Coordinates or cities — instant km, miles, nmi.
Dividend Reinvestment Calculator
Calculate dividend returns with reinvestment and tax.
Dockerfile & Docker Compose Generator
Generate Dockerfile and compose files for Node, Python, Go, Java. Pick DB, ports, env vars. No Docker experience needed.
FAQ Schema Generator
Create Google FAQ rich results. Question-answer pairs, copy code.
Facebook Link Preview
Preview how your link appears on Facebook. Fetch OG meta tags and see the exact Facebook card layout instantly.
Frequency Generator & Tone Tool
Pure tones 20Hz-20kHz. Water extraction mode included.
Function Graph Plotter
Math function graphing. sin, cos, x², multi-function.
Gradient Generator
CSS gradients: linear, radial, conic. Copy CSS code.
HTML Entity Encoder & Decoder
Encode/decode HTML entities. XSS prevention.
HTML to Markdown Converter
Convert HTML to Markdown instantly. Handles headings, lists, links, images, tables, code blocks. Free, client-side, no sign-up.
HTTP Header Checker
Check HTTP response headers for any URL. View status, security, cache headers. Free developer tool.
Hash Generator
SHA-256, SHA-1, SHA-512. Web Crypto API.
Hreflang Tag Generator
Generate hreflang link tags for multilingual SEO. 50+ languages, smart URL patterns. Free hreflang tool.
IP Subnet Calculator
Calculate subnet details from IP + mask. Network, broadcast, usable hosts, wildcard mask. IPv4.
Image Format Converter
PNG, JPEG, WebP conversion. Batch processing support.
Image Resizer & Compressor
Resize & compress images. Canvas API, no upload.
Image to PDF
Convert JPG, PNG, WebP images to PDF. A4/Letter, margins.
Inches to Centimeters Converter
Convert inches to cm instantly. Free, accurate, no signup.
Inflation Calculator
Calculate inflation impact. Future value of money.
Invoice Generator
Create invoices, print-ready template. Export via print.
JSON Compare
Compare two JSON objects. Find added/removed/changed keys.
JSON Formatter & Validator
Format, validate, minify JSON. Error line detection.
JSON Minifier
Minify and compress JSON. Strip whitespace, reduce file size. Size comparison stats.
JSON Schema Generator
Generate JSON Schema from JSON. Auto-detects types.
JSON to Java POJO/DTO Converter
Convert JSON to Java POJO classes with Lombok, Jackson, nested objects. Free online converter, no sign-up.
JSON to TypeScript Generator
Convert JSON to TypeScript interfaces, types, and enums. Optional readonly, strict null checks.
JSON ↔ YAML Converter
Convert JSON to YAML and YAML to JSON. js-yaml powered, bidirectional. Handles nested objects and arrays.
JSONPath Tester
Evaluate JSONPath queries. Select data from JSON.
JWT Decoder
Decode JWT tokens. View header, payload, expiration.
Keto & Macro Calculator
Calculate keto macros. BMR, TDEE, doughnut chart.
Kilograms to Pounds Converter
Convert kg to lbs instantly. Free, accurate, no signup.
LinkedIn Link Preview
Preview how your link appears on LinkedIn. Fetch OG meta tags and see LinkedIn card layout. Free professional sharing tool.
Loan & Mortgage Calculator
Loan calculator. Monthly payment, amortization, early payoff.
Lorem Ipsum Generator
Placeholder text. Paragraphs or words. HTML output.
Markdown Previewer
Live Markdown preview. Write left, see rendered HTML right.
Markdown Table Generator & CSV Converter
Create Markdown tables visually or paste CSV. Align columns, export to HTML. Works with GitHub Flavored Markdown.
Meta Tag & SERP Preview Generator
Preview Google search results and social cards. Generate meta tags with live SERP simulator. Free SEO tool.
Meta Tag Generator
Generate SEO meta, Open Graph, Twitter Card tags.
Metronome
Precise rhythm tool for musicians. No subscription paywalls.
Minesweeper
Classic minesweeper. 3 difficulty levels. Flag, reveal, win.
Morse Code Translator
Encode text to Morse code and decode Morse back to text. Play as audio tones. International ITU standard.
Name Generator
Generate unique names for characters, babies, and brands. 7 categories: fantasy, modern, medieval, sci-fi, Nordic, Japanese, Arabic. Gender filters. Free, no sign-up.
Number Base Converter
Binary, octal, decimal, hex. Real-time conversion.
Number to Words Converter
Convert numbers to words in 8 languages: English, Turkish, German, French, Spanish, Arabic, Hindi, Chinese.
Open Graph Preview
Social media link preview. Facebook, Twitter, LinkedIn.
PDF Merge
Combine multiple PDFs into one. Drag-and-drop, reorder, instant download.
PDF Split
Split PDFs by page range. Extract individual pages or ranges.
PDF to Image
Convert PDF pages to PNG, JPG, or WebP images. High quality.
Pace & Running Calculator
Running pace, time, distance. 5K, 10K, marathon splits.
Password Generator
Generate strong, random passwords. Configurable length.
Password Strength Checker
Entropy score, crack time, improvement tips.
Pixel Art Maker
Draw pixel art on a customizable grid. 24-color palette, 3 grid sizes, click-and-drag drawing, and PNG export. Free, no sign-up.
Pomodoro + Task Tracker
Pomodoro timer + task list. Progress tracking.
Pomodoro Timer
Focus timer with clean design. No ads interrupting your flow.
Pounds to Kilograms Converter
Convert lbs to kg instantly. Free, accurate, no signup.
Pregnancy Due Date Calculator
Estimate your due date instantly. No sign-ups.
QR Code Generator & Scanner
Create and scan QR codes instantly. No app needed.
Random Number Generator
Cryptographic random numbers. Dice, lottery, unique picks.
Reaction Time Test
Test your reflexes. High-precision timing via performance.now().
Readability Score Checker
Flesch-Kincaid score, grade level, word statistics.
Redirect Checker
Trace redirect chains. See each hop with status codes and final destination. Free SEO tool.
Regex Explainer
Translate regex to human language. Token-by-token explanation.
Regex Tester
Test regex in real-time. Highlight matches, groups.
Retirement Calculator
Estimate retirement fund and monthly income. 4% rule, growth chart.
Robots.txt Generator
Generate robots.txt. Allow/block crawlers.
Robots.txt Tester
Test any URL against robots.txt rules. Check which pages Googlebot and Bingbot can crawl. Free SEO tool.
Roman Numeral Converter
Convert numbers to Roman numerals and back.
SERP Preview Tool
Google SERP preview. Title 60, description 160 chars.
SQL Formatter
Format SQL. MySQL, PostgreSQL, SQLite. Beautify/minify.
SQL to JSON Converter
Convert SQL CREATE TABLE + INSERT to JSON. Multi-dialect, big-int safe.
SSH Key Generator
Generate SSH key pairs. RSA, ECDSA. PEM format.
SSL Certificate Decoder
Decode SSL/X.509 certificates. View Subject, Issuer, Validity, Fingerprint, Public Key. Free developer tool.
SVG Optimizer
Minify and clean SVG code. Remove metadata, comments, whitespace.
Savings Calculator
Future value of savings. Compound growth with Chart.js visualization.
Schema Markup Generator
Generate JSON-LD schema. Organization, Product, FAQ, Article, more.
Scientific Calculator
Trig, log, sqrt, power. Expression input with history.
Signature Generator
Create a beautiful handwritten signature. Download as PNG.
Sitemap Validator
Validate XML sitemaps. Check format, count URLs, detect errors. Supports sitemap index files.
Slack Link Preview
Preview how your link unfurls in Slack. Compact card with colored sidebar, thumbnail, and description. Free unfurl preview.
Sleep Sounds & White Noise
Mix rain, fire, ocean, and white noise. Fall asleep faster.
Snake Game
Classic snake game. Eat, grow, beat your high score.
Spirit Level
Use your phone as a bubble level. Perfect for hanging pictures.
Stopwatch
Online stopwatch with lap timing. Millisecond precision.
Sunrise & Sunset Calculator
Calculate sunrise, sunset, golden hour and blue hour for any city. Pure client-side astronomy — no sign-up.
Temperature Tracker
Track body temp. Chart, CSV export. Fever alerts.
Text Diff Checker
Compare two texts side by side. Color-coded LCS diff.
Text Encryptor / Decryptor
AES-256-GCM encryption. Password-protected messages.
Thesaurus & Synonym Finder
Find synonyms, antonyms, and related words instantly. Real-time lookup with similarity scores and part-of-speech labels. Free, no sign-up.
Time Zone Converter
Convert time between any two IANA time zones. Meeting planner mode finds overlapping business hours. EST→IST, UTC→Tokyo, instant, no signup.
Tip Calculator
Calculate tips and split bills. Works worldwide.
Trade Risk & Break-Even Calc
Break-even price with commission. BIST, Binance presets.
Twitter Card Preview
Preview how your page appears as a Twitter Card. Fetch meta tags and see summary_large_image layout instantly.
URL Encoder & Decoder
Encode/decode URL strings. Percent-encoding tool.
URL Slug Generator
Convert text to clean, SEO-friendly URL slugs. Handles special characters and accents — hyphen-separated, lowercase. Free SEO tool.
UTM Builder
Build UTM campaign URLs. Source, medium, campaign.
UUID Generator
Generate UUID v4 identifiers. Browser crypto API.
Unit Converter
Length, weight, temp, area, volume, speed. All in one.
Unix Timestamp Converter
Convert Unix timestamps to dates and back. Bidirectional.
Venn Diagram Maker
Create beautiful 2-circle and 3-circle Venn diagrams. Customize colors, labels, and intersection text. Export as SVG or PNG. Free, no sign-up.
Video Hook & Script Timer
Calculate video duration from script. WPM slider, hook detection.
Water Intake Calculator
Daily water needs based on weight, activity, climate.
What Is My IP Address
Check your public IPv4 & IPv6, ISP, and location instantly.
Word & Character Counter
Count words, characters, sentences, and reading time.
Wordle Solver
Wordle solver. Letter filtering, 2000+ words.
World Clock
Track time across multiple cities. Search, add city clocks. Day/night indicators, UTC offsets. Free world clock.
XML Formatter & Validator
Format & validate XML. DOMParser error detection.
XML ↔ JSON Converter
Bidirectional XML ↔ JSON conversion. Recursive mapping.
XPath Tester & Evaluator
Test and evaluate XPath expressions against XML documents instantly. Query XML nodes with XPath 1.0, view results with generated paths. Free, browser-based, zero-dependency.
XSD Generator & Validator
Generate XSD schema from XML, or validate XML against XSD. Zero-dependency, browser-based.
YAML Validator
Validate YAML, convert to JSON. Error line detection.
YouTube Title & Tag Generator
Generate YouTube titles and tags from keywords.
cURL to Code Converter
Convert curl commands to Python, Node.js, and Java code. Parse -X, -H, -d flags. Free developer tool.