MaisTools
84 free tools ยท 8 categories

Free Online Tools for Everyday Tasks

A growing collection of free online tools for developers, designers, writers, and students. Format JSON, compress images, generate passwords, convert units, run calculators, preview Markdown, and more. No sign-up, no installation, everything runs privately in your browser.

PrivateAlways FreeNo Sign-upBrowser-based
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No paywalls, no credits, no subscriptions. Use every tool without limits.
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Works in any modern browser, on any device, with nothing to download.
#Calculator#Converter#Generator#Editor#Viewer#OnlineTools#Free#NoSignup#JSON#YAML#CSV#XML#Markdown#JWT#Base64#Regex#UUID#Hash#QRCode#Password#BMI#Stopwatch#Timer#WordCounter#RomanNumerals

Security

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SecurityPassword GeneratorGenerate strong, secure passwords instantly in your browser.SecurityText EncryptorEncrypt and decrypt text with multiple algorithms, directly in your browser.SecurityHash GeneratorCompute cryptographic hashes from text or any file, entirely in your browser.SecurityText ScramblerScramble and unscramble text with a secret key.SecurityLetters to NumbersConvert letters to numbers using the A1Z26 cipher (A=1, B=2, Z=26) and decode numbers back to text.

Productivity

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ProductivityMarkdown PreviewWrite Markdown and see the rendered HTML preview in real time.ProductivityQR Code GeneratorGenerate QR codes from text or links, directly in your browser.ProductivityColor ConverterConvert colors between HEX, RGB, HSL, HSV, and CMYK formats instantly in your browser.ProductivityMarkdown EditorWrite Markdown with a formatting toolbar and live preview - import, export, and copy as Markdown or HTML.ProductivityStopwatch & TimerTrack elapsed time with laps or set a countdown with an audible alarm.ProductivityText DiffPaste two texts to see line-by-line differences.ProductivityRandom PickerPaste a list of items - one per line - and pick one at random.ProductivityCalendarNavigate between months and view the calendar with today highlighted.ProductivityColor PickerUpload an image and click to extract colors from any point.ProductivityColor PaletteUpload an image and automatically extract a color palette with your chosen number of colors.ProductivitySummarizeAutomatically summarize text with extractive algorithms (TextRank, LSA, LexRank). Multilingual, offline, no AI.ProductivityAI Prompt GeneratorFill in the fields and generate a model-aware prompt - Claude XML tags, ChatGPT markdown, Midjourney descriptors and more.ProductivityMarkdown to PDFWrite Markdown and generate a PDF ready to save or print.ProductivityTime UntilFind out how long until a date or time. Counts days, hours, minutes and seconds in real time.

Developer

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DeveloperJSON FormatterFormat, validate, and minify JSON directly in your browser.DeveloperUUID GeneratorGenerate UUID v4 identifiers instantly in your browser.DeveloperWhat Is My IPFind your public IP address along with location, ISP, and timezone information.DeveloperText to SlugConvert text into a clean, URL-friendly slug.DeveloperLorem Ipsum GeneratorGenerate lorem ipsum placeholder text for your designs and mockups.DeveloperBase64 Encoder / DecoderEncode text to Base64 and decode Base64 strings back to text - UTF-8 safe, URL-safe option.DeveloperRegex TesterTest JavaScript regular expressions with live highlighting and capture groups.DeveloperJSON ViewerPaste JSON to explore it as a collapsible tree with color-coded values.DeveloperToken EstimatorEstimate the token count of your text for any modern language model.DeveloperXML ViewerPaste XML to explore it as a collapsible tree with highlighted elements, attributes and values.DeveloperCode Comment Block GeneratorTurn any text into code comment blocks for popular programming languages.DeveloperUnix Timestamp ConverterConvert between Unix timestamps and human dates in either direction.DeveloperJWT DecoderPaste a JWT and inspect the header, payload, claims and expiration state. Everything runs in your browser.DeveloperJSON YAML CSV ConverterPaste JSON, YAML or CSV, pick the target format and convert instantly.DeveloperCSV Viewer and EditorOpen a CSV file, view it in an editable table and download the result.DeveloperYAML Viewer and EditorPaste or load YAML to explore the structure as a tree, edit the content, format and download.DeveloperSorting Algorithm VisualizerSee sorting algorithms in action. Compare Bubble, Selection, Insertion, Quick, Merge and Heap Sort step by step.

Media

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MediaImage to ICO ConverterConvert images to ICO format with multiple sizes, directly in your browser.MediaImage ResizerResize one or many images at once and download the result directly in your browser.MediaBlack & White Image ConverterConvert any image to black and white or grayscale directly in your browser.MediaImage ViewerOpen and view images directly in your browser - no upload, no data sent.MediaSound CutterCut audio files directly in your browser, no installation needed.MediaImage CompressorCompress images and reduce file size with adjustable quality - runs entirely in your browser.MediaNoise Texture GeneratorGenerate procedural noise textures with Perlin or Simplex algorithms. Configure octaves, scale and seed, then download as PNG.MediaICO ViewerView the contents of an ICO file and inspect every embedded size.MediaExtract Text from ImageUpload an image and extract its text with OCR. Everything runs in your browser, no upload to servers.MediaPhoto Metadata ViewerSee the EXIF metadata stored in a photo: camera, exposure settings, date and GPS location.

Text & Numbers

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Text & NumbersRandom Number GeneratorGenerate random numbers between any range, integers or decimals, directly in your browser.Text & NumbersWord CounterCount words, characters, lines, and paragraphs in real time.Text & NumbersRoman NumeralsConvert numbers to Roman numerals and from Roman numerals to numbers.Text & NumbersCounterCount up or down with a simple, fast online counter.Text & NumbersRemove AccentsRemove accents from your text directly in your browser.Text & NumbersText Case ConverterConvert your text to uppercase, lowercase, title case, camelCase, snake_case, kebab-case and more - instantly.Text & NumbersRandom LetterGenerate a random letter from the alphabet with options for case, vowels, and consonants.Text & NumbersMorse CodeConvert text to Morse code and Morse code back to text.Text & NumbersLine Break After PeriodPaste your text and get every sentence on its own line - automatic break after each period.Text & NumbersAcronym GeneratorTurn any phrase into an acronym or abbreviation instantly.Text & NumbersAlphabetView the 26 letters of the Latin alphabet, with position and NATO phonetic alphabet. Click any letter to copy it.

Calculator

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CalculatorUnit ConverterConvert between dozens of units across 8 categories, directly in your browser.CalculatorRule of ThreeCalculate the missing value using the simple rule of three (cross multiplication).CalculatorAge CalculatorCalculate your exact age in years, months, and days from your birth date.CalculatorPercentage CalculatorCalculate percentages, find percent of a value, or get the percentage change.CalculatorAngle ConverterConvert angles between degrees, radians, gradians, arc minutes, arc seconds and revolutions.CalculatorTip CalculatorCalculate the tip and split the bill between multiple people.CalculatorScientific NotationConvert numbers to scientific notation and display the mantissa and exponent.CalculatorBayes CalculatorApplies Bayes' theorem to compute conditional probabilities, including positive and negative predictive values for diagnostic tests.CalculatorBMI CalculatorCalculate your Body Mass Index from weight and height, in metric or imperial units.

Other

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OtherMeme GeneratorCreate memes with custom text at the top and bottom of any image.OtherGuess the NumberFind the secret number between 1 and 100 in as few guesses as possible.OtherTic-Tac-ToeTic-Tac-Toe for two players. X and O randomly assigned each game.OtherASCII Art MakerDraw ASCII art using pencil, eraser and fill tools. Copy the result.Other8-bit / 16-bit Image ConverterConvert images to retro 8-bit or 16-bit style with a reduced color palette.Other8-bit Sound GeneratorGenerate retro 8-bit chiptune sounds with wave selection, pitch, duration and ADSR envelope.OtherGame Idea GeneratorGenerate creative game ideas by mixing genre, setting, mechanic, perspective, tone and goal.OtherMaze GeneratorCreate perfect mazes of any size, reveal the solution and download as PNG.OtherSudoku GeneratorGenerate Sudoku puzzles with a unique solution, reveal the answer and download as PNG or copy as text.OtherDiscord Timestamp GeneratorGenerate Discord timestamps that show in each viewer's local time and language.OtherEmoji Lorem Ipsum GeneratorGenerate random emoji placeholder text for your designs and mockups.OtherRock, Paper, ScissorsPlay Rock Paper Scissors against the computer and track your score.OtherCoin FlipFlip a virtual coin and get heads or tails instantly.

Guides

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GuidesGit Cheat SheetQuick Git reference: commands, flags, examples and variations organized by section with instant search.GuidesLinux Cheat SheetQuick Linux reference: terminal commands, flags, examples and pipe combinations, organised by section with instant search.GuidesPowerShell Cheat SheetQuick PowerShell reference: cmdlets, flags, examples and the object pipeline, organised by section with instant search.GuidesMarkdown Cheat SheetQuick Markdown reference with syntax, examples and preview side by side.GuidesJSON vs YAML vs XML vs TOML vs INI vs CSVDirect comparison between the most common data serialization formats. Syntax, traits and when each one is the right call.