Free Online Tools.
No Downloads. No Subscriptions.
Every tool on this page is free, works in your browser, and never asks for your credit card.
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QR Code Generator & Scanner
Create and scan QR codes instantly. No app needed.
AvailableSpirit Level
Use your phone as a bubble level. Perfect for hanging pictures.
AvailablePomodoro Timer
Focus timer with clean design. No ads interrupting your flow.
AvailableMetronome
Precise rhythm tool for musicians. No subscription paywalls.
AvailableDecibel Meter
Measure sound levels. Great for classrooms and events.
AvailableDecision Wheel
Spin the wheel with custom options. Fair, fast, and free.
AvailableSleep Sounds & White Noise
Mix rain, fire, ocean, and white noise. Fall asleep faster.
AvailableDead Pixel Test
Full-screen color test for your screen. No ads during the test.
AvailablePregnancy Due Date Calculator
Estimate your due date instantly. No sign-ups.
AvailableSignature Generator
Create a beautiful handwritten signature. Download as PNG.
AvailableBMI Calculator
Check your Body Mass Index instantly with WHO classification. Metric & imperial units, privacy-first.
AvailableAge Calculator
Calculate exact age in years, months, and days.
AvailablePassword Generator
Generate strong, random passwords. Configurable length.
AvailableWord & Character Counter
Count words, characters, sentences, and reading time.
AvailableBase64 Encoder & Decoder
Encode and decode Base64 strings. Essential developer utility.
AvailableColor Code Converter
Convert HEX to RGB and HSL. Pick colors and copy codes.
AvailableCountdown Timer
Set a date and time, get a live countdown. Embeddable.
AvailableDPI & PPI Calculator
Calculate screen pixel density. For designers and developers.
AvailableRoman Numeral Converter
Convert numbers to Roman numerals and back.
AvailableSQL to JSON Converter
Convert SQL CREATE TABLE + INSERT to JSON. Multi-dialect, big-int safe.
AvailableTip Calculator
Calculate tips and split bills. Works worldwide.
AvailableCompound Interest Calculator
See how your money grows with compound interest. Charts.
AvailableDividend Reinvestment Calculator
Calculate dividend returns with reinvestment and tax.
AvailableMinesweeper
Classic minesweeper. 3 difficulty levels. Flag, reveal, win.
AvailableSnake Game
Classic snake game. Eat, grow, beat your high score.
AvailableReaction Time Test
Test your reflexes. High-precision timing via performance.now().
AvailableFrequency Generator & Tone Tool
Pure tones 20Hz-20kHz. Water extraction mode included.
AvailableText Diff Checker
Compare two texts side by side. Color-coded LCS diff.
AvailableVideo Hook & Script Timer
Calculate video duration from script. WPM slider, hook detection.
AvailableYouTube Title & Tag Generator
Generate YouTube titles and tags from keywords.
AvailableAI Token Counter & Cost Estimator
Count tokens, estimate API costs for 12 models.
AvailableJSON Formatter & Validator
Format, validate, minify JSON. Error line detection.
AvailableTrade Risk & Break-Even Calc
Break-even price with commission. BIST, Binance presets.
AvailableDCA Calculator
Dollar Cost Averaging. Add buys, see real average cost.
AvailableKeto & Macro Calculator
Calculate keto macros. BMR, TDEE, doughnut chart.
AvailableKilograms to Pounds Converter
Convert kg to lbs instantly. Free, accurate, no signup.
AvailableUUID Generator
Generate UUID v4 identifiers. Browser crypto API.
AvailableJWT Decoder
Decode JWT tokens. View header, payload, expiration.
AvailableUnix Timestamp Converter
Convert Unix timestamps to dates and back. Bidirectional.
AvailableURL Encoder & Decoder
Encode/decode URL strings. Percent-encoding tool.
AvailableHTML Entity Encoder & Decoder
Encode/decode HTML entities. XSS prevention.
AvailableCase Converter
UPPER, lower, camelCase, snake_case, 8 formats.
AvailableCentimeters to Inches Converter
Convert cm to inches instantly. Free, accurate, no signup.
AvailableNumber Base Converter
Binary, octal, decimal, hex. Real-time conversion.
AvailableStopwatch
Online stopwatch with lap timing. Millisecond precision.
AvailableDate Difference Calculator
Days between dates. Business days, years, weeks.
AvailableUTM Builder
Build UTM campaign URLs. Source, medium, campaign.
AvailableRobots.txt Generator
Generate robots.txt. Allow/block crawlers.
AvailableMeta Tag Generator
Generate SEO meta, Open Graph, Twitter Card tags.
AvailableColor Palette Generator
Complementary, analogous, triadic, monochrome palettes.
AvailableLorem Ipsum Generator
Placeholder text. Paragraphs or words. HTML output.
AvailablePounds to Kilograms Converter
Convert lbs to kg instantly. Free, accurate, no signup.
AvailableCups to Milliliters Converter
Convert cups to ml instantly. Perfect for cooking and baking.
AvailableCron Expression Builder
Visual cron builder. Human-readable. Presets included.
AvailableHash Generator
SHA-256, SHA-1, SHA-512. Web Crypto API.
AvailableRegex Tester
Test regex in real-time. Highlight matches, groups.
AvailableMarkdown Previewer
Live Markdown preview. Write left, see rendered HTML right.
AvailablePassword Strength Checker
Entropy score, crack time, improvement tips.
AvailableUnit Converter
Length, weight, temp, area, volume, speed. All in one.
AvailableReadability Score Checker
Flesch-Kincaid score, grade level, word statistics.
AvailableTime Zone Converter
Compare current time across cities worldwide.
AvailableJSON Compare
Compare two JSON objects. Find added/removed/changed keys.
AvailableWater Intake Calculator
Daily water needs based on weight, activity, climate.
AvailableWhat Is My IP Address
Check your public IPv4 & IPv6, ISP, and location instantly.
AvailableNumber to Words Converter
Convert numbers to words in 8 languages: English, Turkish, German, French, Spanish, Arabic, Hindi, Chinese.
AvailableIP Subnet Calculator
Calculate subnet details from IP + mask. Network, broadcast, usable hosts, wildcard mask. IPv4.
AvailableGradient Generator
CSS gradients: linear, radial, conic. Copy CSS code.
AvailableJSON Schema Generator
Generate JSON Schema from JSON. Auto-detects types.
AvailableYAML Validator
Validate YAML, convert to JSON. Error line detection.
AvailableSQL Formatter
Format SQL. MySQL, PostgreSQL, SQLite. Beautify/minify.
AvailableBarcode Generator
CODE128, EAN-13, UPC barcodes. Download SVG/PNG.
AvailableScientific Calculator
Trig, log, sqrt, power. Expression input with history.
AvailableTemperature Tracker
Track body temp. Chart, CSV export. Fever alerts.
AvailableRegex Explainer
Translate regex to human language. Token-by-token explanation.
AvailableXML Formatter & Validator
Format & validate XML. DOMParser error detection.
AvailableXML โ JSON Converter
Bidirectional XML โ JSON conversion. Recursive mapping.
AvailableCSS Minifier
Minify and compress CSS. Strip whitespace, remove comments, reduce file size.
AvailableCSV โ JSON Converter
CSV โ JSON converter. Smart parsing with PapaParse.
AvailableJSON to TypeScript Generator
Convert JSON to TypeScript interfaces, types, and enums. Optional readonly, strict null checks.
AvailableJSONPath Tester
Evaluate JSONPath queries. Select data from JSON.
AvailableSERP Preview Tool
Google SERP preview. Title 60, description 160 chars.
AvailableInflation Calculator
Calculate inflation impact. Future value of money.
AvailableRandom Number Generator
Cryptographic random numbers. Dice, lottery, unique picks.
AvailableAspect Ratio Calculator
Aspect ratio calculator. YouTube, Instagram, TikTok presets.
AvailableText Encryptor / Decryptor
AES-256-GCM encryption. Password-protected messages.
AvailableSSH Key Generator
Generate SSH key pairs. RSA, ECDSA. PEM format.
AvailableBPM Tap Tempo
Tap tempo BPM finder. Tap button or press spacebar.
AvailableOpen Graph Preview
Social media link preview. Facebook, Twitter, LinkedIn.
AvailableImage Resizer & Compressor
Resize & compress images. Canvas API, no upload.
AvailableImage Format Converter
PNG, JPEG, WebP conversion. Batch processing support.
AvailableInches to Centimeters Converter
Convert inches to cm instantly. Free, accurate, no signup.
AvailableLoan & Mortgage Calculator
Loan calculator. Monthly payment, amortization, early payoff.
AvailableCalorie & TDEE Calculator
Daily calorie needs, TDEE, macros. BMR calculation.
AvailableColor Blindness Simulator
Color blindness simulator. 4 types, Canvas LMS matrix.
AvailablePace & Running Calculator
Running pace, time, distance. 5K, 10K, marathon splits.
AvailableColor Contrast Checker
Check WCAG color contrast ratios. AA/AAA compliance for normal and large text. Free, instant, no upload.
AvailablePomodoro + Task Tracker
Pomodoro timer + task list. Progress tracking.
AvailableCurrency Converter
Live exchange rates. Frankfurter API, 7-day chart.
AvailableFunction Graph Plotter
Math function graphing. sin, cos, xยฒ, multi-function.
AvailableInvoice Generator
Create invoices, print-ready template. Export via print.
AvailableWordle Solver
Wordle solver. Letter filtering, 2000+ words.
AvailablePDF Merge
Combine multiple PDFs into one. Drag-and-drop, reorder, instant download.
AvailablePDF Split
Split PDFs by page range. Extract individual pages or ranges.
AvailableImage to PDF
Convert JPG, PNG, WebP images to PDF. A4/Letter, margins.
AvailablePDF to Image
Convert PDF pages to PNG, JPG, or WebP images. High quality.
AvailableSchema Markup Generator
Generate JSON-LD schema. Organization, Product, FAQ, Article, more.
AvailableFAQ Schema Generator
Create Google FAQ rich results. Question-answer pairs, copy code.
AvailableSavings Calculator
Future value of savings. Compound growth with Chart.js visualization.
AvailableRetirement Calculator
Estimate retirement fund and monthly income. 4% rule, growth chart.
AvailableBody Fat Calculator
US Navy body fat % formula. Gender-specific, fitness assessment.
AvailableSVG Optimizer
Minify and clean SVG code. Remove metadata, comments, whitespace.
AvailableCSS Box Shadow Generator
Design box shadows visually. Adjust offset, blur, spread, color. Live preview. Copy CSS.
AvailableCSS Border Radius Generator
Generate border-radius visually. Control each corner individually. px or %. Copy CSS.
AvailableCSS Clamp Generator
Generate CSS clamp() for fluid typography and spacing. Min, preferred, max. Copy instantly.
AvailableJSON Minifier
Minify and compress JSON. Strip whitespace, reduce file size. Size comparison stats.
AvailableJSON to Java POJO/DTO Converter
Convert JSON to Java POJO classes with Lombok, Jackson, nested objects. Free online converter, no sign-up.
AvailableAI Prompt Builder & Optimizer
Build structured prompts for ChatGPT, Claude, Midjourney. Role, tone, format controls. Free and instant.
AvailableDockerfile & Docker Compose Generator
Generate Dockerfile and compose files for Node, Python, Go, Java. Pick DB, ports, env vars. No Docker experience needed.
AvailableMeta Tag & SERP Preview Generator
Preview Google search results and social cards. Generate meta tags with live SERP simulator. Free SEO tool.
AvailableMarkdown Table Generator & CSV Converter
Create Markdown tables visually or paste CSV. Align columns, export to HTML. Works with GitHub Flavored Markdown.
AvailableWorld Clock
Track time across multiple cities. Search, add city clocks. Day/night indicators, UTC offsets. Free world clock.
AvailableThesaurus & Synonym Finder
Find synonyms, antonyms, and related words instantly. Real-time lookup with similarity scores and part-of-speech labels. Free, no sign-up.
AvailableMorse Code Translator
Encode text to Morse code and decode Morse back to text. Play as audio tones. International ITU standard.
AvailableVenn 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.
AvailableName 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.
AvailableRobots.txt Tester
Test any URL against robots.txt rules. Check which pages Googlebot and Bingbot can crawl. Free SEO tool.
AvailableSitemap Validator
Validate XML sitemaps. Check format, count URLs, detect errors. Supports sitemap index files.
AvailableCanonical Tag Checker
Check canonical URLs on any page. Detect missing tags, mismatches, and self-referencing canonicals.
AvailableHreflang Tag Generator
Generate hreflang link tags for multilingual SEO. 50+ languages, smart URL patterns. Free hreflang tool.
AvailableHTTP Header Checker
Check HTTP response headers for any URL. View status, security, cache headers. Free developer tool.
AvailableRedirect Checker
Trace redirect chains. See each hop with status codes and final destination. Free SEO tool.
AvailableTwitter Card Preview
Preview how your page appears as a Twitter Card. Fetch meta tags and see summary_large_image layout instantly.
AvailableFacebook Link Preview
Preview how your link appears on Facebook. Fetch OG meta tags and see the exact Facebook card layout instantly.
AvailableLinkedIn Link Preview
Preview how your link appears on LinkedIn. Fetch OG meta tags and see LinkedIn card layout. Free professional sharing tool.
AvailableDiscord Link Preview
Preview how your link appears as a Discord embed. Colored sidebar, title, description, inline image. Free preview tool.
AvailableSlack Link Preview
Preview how your link unfurls in Slack. Compact card with colored sidebar, thumbnail, and description. Free unfurl preview.
AvailablePixel 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.
AvailableDice Roller
Roll virtual dice with realistic animation. d4 to d100, multiple dice, history tracking. Free, no sign-up.
AvailableCoin Flip
Flip a virtual coin โ heads or tails. True 50/50 via crypto.getRandomValues(). Single or batch mode up to 100 flips.
AvailablecURL to Code Converter
Convert curl commands to Python, Node.js, and Java code. Parse -X, -H, -d flags. Free developer tool.
AvailableSSL Certificate Decoder
Decode SSL/X.509 certificates. View Subject, Issuer, Validity, Fingerprint, Public Key. Free developer tool.
AvailableURL Slug Generator
Convert text to clean URL slugs. Turkish character support (รงโc, ฤโg, ลโs). Hyphen-separated, lowercase. Free SEO tool.
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