Free Online Tools & Mini Apps
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Productivity
Boost your efficiency with our collection of productivity tools. From calculators and converters to time management utilities, these apps help you work smarter and streamline your daily tasks.
Calculator
Free online calculator with basic and scientific functions, keyboard input, and local history.
Open AppClock
Windows-style clock: live time, countdown timer, alarms, stopwatch, focus sessions, and world clocks.
Open AppCountdown Timer
Free online countdown timer with presets, optional sound alerts, and full-screen mode.
Open AppDate Difference Calculator
Calculate the exact time between two dates in years, months, weeks, days, and more.
Open AppPassword Generator
Generate secure, random passwords with customizable options.
Open AppHealth
Take control of your wellness with our health and fitness calculators. Track your BMI, monitor vital metrics, and make informed decisions about your health journey.
Programmer
Essential utilities for software developers and tech professionals. Format JSON, encode Base64, generate secure passwords, and more. Built by developers, for developers.
Base64 Encoder/Decoder
Encode and decode Base64 strings and files instantly in your browser. Private local processing for text, images, and files.
Open AppColor Contrast Checker
Check color contrast ratios for WCAG AA/AAA compliance with instant previews, fix suggestions, and shareable checks.
Open AppHash Generator
Generate MD5, SHA-1, and SHA-256 hashes instantly from text.
Open AppJSON Formatter
Format, minify, and validate JSON with clear error messages and syntax highlighting.
Open AppJWT Parser
Decode JWT header and payload locally, inspect claims, and review expiration status without sending tokens to a server.
Open AppGames
Take a break and challenge your mind with our collection of classic games. Play against intelligent AI opponents or compete with friends for quick entertainment.
4 in a Row
Play the classic Connect Four game against an intelligent AI or challenge a friend. Drop discs to connect four in a row horizontally, vertically, or diagonally.
Open AppLift Logic
Run a 2D elevator by hand and serve every passenger — beat the par time and par energy to earn stars.
Open AppMath Birds
Launch angry birds by solving math problems! An Angry Birds-style game that makes learning addition and subtraction fun for kids.
Open AppTic Tac Toe
Play the classic Tic Tac Toe game against an intelligent AI or challenge a friend. Three difficulty levels including unbeatable hard mode.
Open AppVeggie Vendetta
Slingshot vegetables to destroy insect towers and save your garden. Physics-based puzzle game with 10 levels.
Open AppEducation
Interactive learning tools for students and curious minds of all ages. From alphabet learning for young children to educational resources for lifelong learners.
Alphabet Learning
Learn letters and sounds with fun interactive games for kids ages 4-6.
Open AppLift Logic
Run a 2D elevator by hand and serve every passenger — beat the par time and par energy to earn stars.
Open AppMath Birds
Launch angry birds by solving math problems! An Angry Birds-style game that makes learning addition and subtraction fun for kids.
Open AppEmotional Intelligence Test
Free emotional intelligence (EQ) test. Answer 30 questions and get a full breakdown of your 4 core EQ skills.
Open AppRoman Numeral Converter
Convert between Roman numerals and integers.
Open AppFitness
Tools for workouts and training. Build interval sequences, run HIIT and Tabata sessions, and keep the whole class in sync with the full-screen display.
Daily Mobility & Stretch Routine Generator
A free online daily mobility & stretch routine generator that builds a personalized, time-budgeted, equipment-free routine in seconds from 40 curated moves. Pick a goal and a 5, 10 or 15-minute budget and get a shareable, printable routine. No sign-up, no account, and everything runs in your browser.
Open AppWorkout Interval Timer
Free online workout interval timer: Tabata, HIIT, EMOM, AMRAP, or unlimited custom work/rest phases with audio cues, full-screen mode, and offline-friendly storage. No sign-up, no account, no ads.
Open AppSearch apps
Age Calculator
Calculate your exact age in years, months, and days. See your next birthday countdown and discover fun facts about your birth date.
Open AppAlphabet Learning
Learn letters and sounds with fun interactive games for kids ages 4-6.
Open AppASCII Text Drawer
Create ASCII art banners from text with selectable fonts.
Open AppBase64 Encoder/Decoder
Encode and decode Base64 strings and files instantly in your browser. Private local processing for text, images, and files.
Open AppBase64 File Converter
Convert files to Base64 and decode Base64 back to downloadable files entirely in your browser.
Open AppBase64 String Converter
Encode plain text to Base64 and decode Base64 back to UTF-8 text instantly in your browser.
Open AppBasic Auth Generator
Generate the full Authorization: Basic header and raw Base64 token from username and password credentials. Fast, secure, and entirely in your browser.
Open AppBcrypt Hash Generator
Hash passwords with bcrypt, adjust the cost factor, and verify matches locally in your browser.
Open AppBeat Maker
Make beats and compose music in the browser. Step sequencer, piano roll, and one-click chord generator.
Open AppBenchmark Builder
Create JavaScript benchmark cases, tune warmup and iterations, and compare browser-run performance side by side.
Open AppBIP39 Mnemonic Generator
Generate and validate English BIP39 seed phrases locally in your browser.
Open AppBMI Calculator
Calculate your Body Mass Index (BMI) and health status with metric or imperial units and WHO categories.
Open AppCalculator
Free online calculator with basic and scientific functions, keyboard input, and local history.
Open AppCamera Recorder
Record webcam video with live preview and download clips locally in your browser.
Open AppCase Converter
Free online tool to convert text between camelCase, PascalCase, SNAKE_CASE, kebab-case, UPPER CASE, and more — right in your browser.
Open AppChess Clock
A simple two-player chess clock with custom time controls and reload-safe game recovery.
Open AppChmod Calculator
Convert between numeric and symbolic chmod permissions and copy a ready command.
Open AppChronometer
Simple stopwatch with lap and split tracking.
Open AppClock
Windows-style clock: live time, countdown timer, alarms, stopwatch, focus sessions, and world clocks.
Open AppColor Contrast Checker
Check color contrast ratios for WCAG AA/AAA compliance with instant previews, fix suggestions, and shareable checks.
Open AppColor Converter
Convert colors between HEX, RGB, and HSL formats with live JSON output and clipboard helpers.
Open AppColor Picker
Pick colors, extract from local images, generate palettes, check contrast, and build CSS gradients. Supports HEX, RGB(A), HSL(A), HSV, and CMYK.
Open AppCountdown Timer
Free online countdown timer with presets, optional sound alerts, and full-screen mode.
Open AppCPU Benchmark
Test your processor speed with a browser-based CPU benchmark and get a single-core, multi-core, and overall score.
Open AppCrontab Generator
Build cron expressions with a visual schedule builder.
Open AppCSV JSON Converter
Convert between CSV and JSON instantly in your browser. Paste CSV with a header row to get JSON, or paste JSON to get CSV.
Open AppCube Rush (Fan-Style Rhythm Runner)
Play a fast-paced, one-button rhythm runner in your browser. Jump over spikes, ride pads, and flip gravity across five original levels of rising difficulty — or let Autoplay drive the verified solution.
Open AppDate Difference Calculator
Calculate the exact time between two dates in years, months, weeks, days, and more.
Open AppDate Time Converter
Convert Unix timestamps into ISO 8601, UTC, local time, and copyable epoch values.
Open AppDevice Information
View a live snapshot of your browser, screen, language, timezone, and connection details.
Open AppDiff Checker
Compare two texts side-by-side and instantly see all differences highlighted.
Open AppDisplay Bandwidth Checker
Check whether your resolution, refresh rate and color format will actually run over HDMI, DisplayPort or USB-C Alt-Mode — with the exact Gbps required vs. the link maximum and the fix when it does not fit.
Open AppDocker Run to Compose Converter
Convert a docker run command into starter docker-compose YAML in your browser.
Open AppEmail Normalizer
Normalize a single email address for cleaner dedupe and review.
Open AppEmoji Picker
Search a curated emoji set by keyword and copy the matches instantly.
Open AppEmotional Intelligence Test
Free emotional intelligence (EQ) test. Answer 30 questions and get a full breakdown of your 4 core EQ skills.
Open AppText Encryption
Encrypt or decrypt text locally with AES-GCM and a passphrase.
Open AppETA Calculator
Estimate when something will finish from seconds, duration lines, or progress plus rate.
Open App4 in a Row
Play the classic Connect Four game against an intelligent AI or challenge a friend. Drop discs to connect four in a row horizontally, vertically, or diagonally.
Open AppFPS Playground
An interactive playground that renders a live 2D animation at any frame rate you choose, with a live FPS and frame-time readout, so you can see and feel the difference between frame rates.
Open AppFrametime Log Analyzer
Paste or drop a frametime capture (PresentMon, CapFrameX, OCAT, RTSS OSDServer, or plain milliseconds) and get average and median FPS, P95/P99, 1% and 0.1% lows in two clearly labeled methods, spike counts, frametime graphs and a plain-English stutter verdict. Runs 100% in your browser — no upload, no sign-up.
Open AppGit Memo
Search and copy a curated set of common Git commands.
Open AppGPU Benchmark
Test your graphics card in the browser with a GPU benchmark that renders a heavy GPU-bound 3D scene and measures the median GPU milliseconds per frame (derived FPS, an overall score and tier).
Open AppHash Generator
Generate MD5, SHA-1, and SHA-256 hashes instantly from text.
Open AppHash Text
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text directly in your browser.
Open AppHMAC Generator
Generate HMAC signatures from a message and secret key with SHA-1, SHA-256, SHA-384, or SHA-512.
Open AppHTML Entities Encoder/Decoder
Encode or decode HTML entities instantly, including quotes and numeric entity sequences.
Open AppHTML Playground
Paste HTML, CSS, and JS — see the live output instantly, just like JSFiddle.
Open AppHTML WYSIWYG Editor
Write and format rich text in a simple browser editor, then copy or download the cleaned HTML fragment.
Open AppHTTP Status Codes
Look up common HTTP status codes or search reason phrases instantly.
Open AppIBAN Validator and Parser
Validate an IBAN, inspect its core parts, and confirm checksum and length rules in the browser.
Open AppImage Background Remover
Remove image backgrounds with AI — 100% in your browser. No uploads, no account, free.
Open AppImage Editor
Resize, crop, rotate and remove backgrounds — export as WebP, JPG or PNG. 100% in your browser.
Open AppImage Format Converter
Convert images between PNG, JPEG, WebP and HEIC entirely in your browser. Drop, paste or pick files — or queue many at once — set JPEG/WebP quality, see the before/after size, and download each result or the whole batch as a ZIP. Your images are processed on your device and never uploaded.
Open AppInteger Base Converter
Convert signed integers between decimal, hexadecimal, binary, and octal with strict validation in the browser.
Open AppIPv4 Address Converter
Convert dotted IPv4 addresses into decimal, hex bytes, binary, and reversed-octet form.
Open AppIPv4 Range Expander
Expand CIDR blocks and dash ranges into complete IPv4 address lists.
Open AppIPv4 Subnet Calculator
Calculate network, broadcast, subnet mask, and host range from an IPv4 address and CIDR prefix.
Open AppIPv6 ULA Generator
Generate RFC4193 IPv6 Unique Local Address prefixes and /64 subnets in your browser.
Open AppJSON Diff
Compare two JSON documents in your browser, validate syntax, and get a copyable structured diff with stable paths.
Open AppJSON Formatter
Format, minify, and validate JSON with clear error messages and syntax highlighting.
Open AppJSON Minify
Minify JSON by removing whitespace safely in your browser.
Open AppJSON to CSV Converter
Convert JSON arrays to CSV with headers in your browser.
Open AppJSON to TOML Converter
Convert JSON objects and arrays into TOML configuration text in your browser.
Open AppJSON to XML Converter
Convert JSON objects, arrays, and values into well-formed XML in your browser.
Open AppJSON to YAML Converter
Convert JSON objects, arrays, and values into clean YAML in your browser.
Open AppJSON Viewer
View, validate, and explore JSON as a collapsible tree.
Open AppJWT Parser
Decode JWT header and payload locally, inspect claims, and review expiration status without sending tokens to a server.
Open AppKeycode Info
Inspect JavaScript keyboard event values in real time, including key, code, keyCode, and modifier state.
Open AppKids BMI Calculator
Calculate BMI percentile for children ages 2-19 using CDC growth charts. Get accurate BMI-for-age assessment.
Open AppLift Logic
Run a 2D elevator by hand and serve every passenger — beat the par time and par energy to earn stars.
Open AppList Converter
Convert lists between CSV, JSON, and plain text.
Open AppLLM Server Cost Calculator
Estimate the electricity cost of running a local LLM server. Compare self-hosted GPU profiles against a cloud API, with live results.
Open AppLorem Ipsum Generator
Generate placeholder text for your designs and mockups. Create paragraphs, sentences, or words instantly.
Open AppMAC Address Generator
Generate random MAC addresses with vendor options.
Open AppMAC Address Lookup
Identify vendors and analyze MAC address bits.
Open AppMarkdown Previewer
Live Markdown editor with instant preview. Write and preview GitHub-flavored Markdown in real-time.
Open AppMarkdown to HTML
Convert Markdown to clean HTML in your browser with a live preview, options, and copyable output.
Open AppMath Birds
Launch angry birds by solving math problems! An Angry Birds-style game that makes learning addition and subtraction fun for kids.
Open AppMath Evaluator
Math Evaluator: Evaluate mathematical expressions with functions, constants, and operators directly in your browser.
Open AppMeta Tag Generator
Generate SEO and social meta tags with a live HTML preview.
Open AppMIME Types Lookup
Search a built-in database of MIME types by file extension or media type and copy the result instantly.
Open AppDaily Mobility & Stretch Routine Generator
A free online daily mobility & stretch routine generator that builds a personalized, time-budgeted, equipment-free routine in seconds from 40 curated moves. Pick a goal and a 5, 10 or 15-minute budget and get a shareable, printable routine. No sign-up, no account, and everything runs in your browser.
Open AppNotepad
A faithful Windows 11-style notepad in your browser. Write across multiple tabs, autosave to your browser, and use find & replace, word wrap, zoom, line numbers, and print. Your text never leaves your device.
Open AppNumeronym Generator
Create numeronyms like i18n or a11y from words.
Open AppOTP Code Generator and Validator
Generate and validate one-time passwords (TOTP and HOTP) right in your browser. Configure the secret, digits, algorithm, and time step.
Open AppPaint
A free online paint editor with a canvas, layers, ten drawing tools, color palette, image import and PNG, JPG or WebP export. Everything runs in your browser.
Open AppPassword Generator
Generate secure, random passwords with customizable options.
Open AppPassword Strength Analyser
Analyze password strength with clear feedback.
Open AppPrivate PDF Merge & Split
Merge PDFs and extract page ranges right in your browser — files never leave your device. No account, no upload, no quota.
Open AppPDF Signature Checker
Check whether a PDF file contains one or more digital signatures, entirely in your browser.
Open AppPercentage Calculator
Calculate percentages, percentage change, markup, discount, and more with this free online tool.
Open AppPhone Parser and Formatter
Parse and format phone numbers with country support.
Open AppPipe Dash
A one-button flappy arcade game: tap to fly a bird through endless pipes, climb the score, and earn medals.
Open AppQR Code Generator
Generate QR codes from text, URLs, WiFi credentials, or contact information. Download as PNG or SVG.
Open AppRAM Speed Test
Test your memory bandwidth right in the browser with an in-browser RAM bandwidth test: sequential read, sequential write, random access, and copy speed in MB/s, plus an overall 0-1000 score.
Open AppRandom Port Generator
Generate random available-looking port numbers.
Open AppRead Aloud
Paste any text and hear it read aloud instantly — private, free, unlimited.
Open AppRefresh Rate Test
Measures the effective rate your display is presenting right now, with frame time, pacing jitter and a confidence figure. Runs 100% in your browser.
Open AppRegex Memo
Handy regex cheat sheet with examples.
Open AppRegex Tester
Test and debug regular expressions with real-time matching, pattern explanation, find & replace, and a built-in cheatsheet.
Open AppRoman Numeral Converter
Convert between Roman numerals and integers.
Open AppRSA Key Pair Generator
Generate RSA public and private key pairs in your browser, export them as JWK or PEM, and copy or download them instantly.
Open AppSafelink Decoder
Decode Microsoft Safe Links to reveal the original destination URL without leaving your browser.
Open AppScreen Recorder
Record your screen, voice, and system audio in your browser — then download the video locally.
Open AppSlugify String
Convert text into clean, URL-friendly slugs instantly in your browser.
Open AppSQL Prettify
Format SQL queries with readable indentation, clause breaks, and keyword casing controls.
Open AppString Obfuscator
Obfuscate text with Base64, ROT13, and masking tools that run entirely in your browser.
Open AppSVG Placeholder Generator
Create lightweight SVG placeholders with custom dimensions, text, colors, and instant preview.
Open AppTemperature Converter
Temperature Converter: Use this tool to process and transform your data directly in your browser.
Open AppText Case Converter
Convert text between uppercase, lowercase, title case, camelCase, snake_case, and 12 other formats.
Open AppText Diff
Text Diff: Use this tool to process and transform your data directly in your browser.
Open AppText Statistics
Text Statistics: Use this tool to process and transform your data directly in your browser.
Open AppText to Binary Converter
Convert text to binary and binary to text.
Open AppText to NATO Alphabet
Convert text into NATO phonetic alphabet words.
Open AppText to Unicode Converter
Convert text to Unicode escape sequences and back.
Open AppTic Tac Toe
Play the classic Tic Tac Toe game against an intelligent AI or challenge a friend. Three difficulty levels including unbeatable hard mode.
Open AppTime Zone Converter
Convert times between any time zones worldwide. Use natural language prompts or select from searchable dropdowns.
Open AppTip Calculator
Calculate tips and split bills easily with customizable tip percentages.
Open AppToken Generator
Token Generator: Use this tool to process and transform your data directly in your browser.
Open AppTOML to JSON Converter
Convert TOML configuration to JSON.
Open AppTOML to YAML Converter
Convert TOML configuration to YAML.
Open AppTone Generator
Play any tone from 16 Hz to 20 kHz. Test your speakers and hearing range right in the browser.
Open AppULID Generator
Generate sortable ULIDs with timestamps and secure randomness. Create single or bulk ULIDs and copy them instantly.
Open AppUnit Converter
Convert between different units of measurement - length, weight, temperature, volume, area, speed, and more.
Open AppURL Encoder
Percent-encode text for safe URLs using encodeURIComponent or encodeURI.
Open AppURL Encoder/Decoder
Encode and decode URLs and special characters instantly with smart URL parsing.
Open AppURL Parser
Parse a URL into protocol, host, port, path, query, and fragment right in your browser.
Open AppUser Agent Parser
Parse user agent strings into readable browser, operating system, engine, and device details right in your browser.
Open AppUUID Generator
Generate RFC 4122 UUID v4 values instantly with batch output, formatting options, and one-click copy.
Open AppVeggie Vendetta
Slingshot vegetables to destroy insect towers and save your garden. Physics-based puzzle game with 10 levels.
Open AppVoice Recorder
Record, trim, and export voice clips in your browser — no upload, no account.
Open AppWebcam Test
Check if your webcam works in seconds with a live preview, mirror view, resolution test, and framing grid.
Open AppWiFi QR Code Generator
Generate WiFi QR codes to share network credentials quickly and privately. WPA, WEP, and open-network payloads stay entirely in your browser for homes, offices, and guest networks.
Open AppWord Counter
Count words, characters, sentences, paragraphs, and estimate reading time in your text.
Open AppWord Snake
Steer a friendly snake to collect the letters of words in order. A fun reading game for kids with three difficulty levels, keyboard and touch controls.
Open AppWorkout Interval Timer
Free online workout interval timer: Tabata, HIIT, EMOM, AMRAP, or unlimited custom work/rest phases with audio cues, full-screen mode, and offline-friendly storage. No sign-up, no account, no ads.
Open AppWorld Clock Dashboard
Track time across multiple time zones with digital and analog clocks. Meeting finder, time comparison slider, and shareable links.
Open AppXML Formatter
Format and validate XML documents.
Open AppXML to JSON Converter
Convert XML data to JSON format.
Open AppYAML to JSON Converter
Convert YAML configuration to JSON.
Open AppYAML to TOML Converter
Convert YAML configuration to TOML.
Open AppYAML Viewer
View and explore YAML with syntax highlighting.
Open AppWhy Choose AppDoesIt
Fast & Lightweight
No bloat, no tracking. Just simple tools that work instantly.
Private & Secure
Everything runs in your browser. Your data stays on your device.
Works Everywhere
Desktop, tablet, or phone. Works on any modern browser.