TOPSCINET Tools

    Free online tools. Your files stay on your device.

    Drop in an image, a PDF or some text and it is edited right here in your browser, never sent to a server. No signup, no limits.

    Everything runs on your own machine
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    Image

    Overview
    Image ResizerResize images by percentage, dimensions, or preset sizes for social media.Image CompressorCompress images to reduce file size while maintaining quality.Image CropperCrop images with custom aspect ratios and precise selection.Image RotatorRotate and flip images to any angle with precision controls.Image Format ConverterConvert between JPG, PNG, WebP and HEIC, including iPhone photos.HEIC to JPG ConverternewTurn iPhone HEIC photos into JPG files that upload anywhere.Image FlipperFlip images horizontally or vertically instantly.Image FiltersApply filters like grayscale, sepia, blur, brightness adjustments.PNG GeneratorGenerate solid color, transparent, or gradient PNG images.Transparent PNG GeneratornewCreate a fully transparent PNG with a real alpha channel, at any size.White PNG GeneratorCreate a plain white background image, for product photos and mockups.Black PNG GeneratorCreate a solid black image, for video frames and dark backgrounds.Blank PNG GeneratorCreate an empty PNG placeholder, transparent or solid colour, at any size.Passport Photo MakerCreate passport photos for any country with proper dimensions and guidelines.EXIF Viewer & RemovernewSee a JPEG's camera info and GPS location, then strip all metadata without re-encoding.

    Text

    Overview
    Word CounterCount words, characters, sentences, and paragraphs with readability scores.Case ConverterConvert text to uppercase, lowercase, title case, and more.Text Diff CheckerCompare two texts and highlight differences side by side.Lorem Ipsum GeneratorGenerate placeholder text for design mockups and layouts.Text RepeaterRepeat text multiple times with custom separators.Find & ReplaceFind and replace text with support for regular expressions.Line CounterCount total, blank and unique lines. Remove duplicates and sort instantly.Remove Duplicate LinesFind and delete duplicate lines, with a report of exactly which lines repeated.Line Break CounterCount line breaks, and detect CRLF, LF or CR line endings in an uploaded file.Text ReverserReverse text, words, or lines instantly.Text SummarizerSummarize long texts using extractive summarization.Reading Time EstimatorEstimate reading and speaking time for any text.Word Frequency CounterCount how often each word appears, with keyword density and common two/three word phrases.

    Developer

    Overview
    JSON FormatterFormat, validate, and minify JSON with syntax highlighting.Base64 Encoder/DecoderEncode or decode text and files to/from Base64.URL Encoder/DecoderEncode or decode URLs for safe transmission.HTML Entity EncoderEncode special characters to HTML entities and vice versa.Regex TesterTest and debug regular expressions with live matching.Hash GeneratorGenerate MD5, SHA-1, SHA-256, and other hash values.UUID GeneratorGenerate unique UUIDs in various versions.Binary ConverterConvert between binary, decimal, hexadecimal, and octal.Favicon GeneratornewGenerate favicons from images, text, or emojis with all sizes.CSV to JSON ConverternewConvert CSV to JSON and back, correctly handling quoted commas, newlines and escaped quotes.JWT DecodernewDecode a JWT's header and payload, with expiry shown as a real date and a live status.

    Color

    Overview
    Color PickerPick colors and get HEX, RGB, HSL values with accessibility info.Palette GeneratorGenerate harmonious color palettes from a base color.Contrast CheckerCheck WCAG color contrast ratios for accessibility.Gradient GeneratorCreate beautiful CSS gradients with live preview.Extract Colors from ImageGet an image's dominant colours as hex codes, each with its share of the photo, plus an eyedropper.

    Math

    Overview
    Percentage CalculatorFind X% of a number, percent change, increases and decreases, instantly.Unit ConverterConvert between length, weight, temperature, and more.Scientific CalculatorFull-featured scientific calculator with advanced functions.BMI CalculatorCalculate Body Mass Index with health category indicators.Binary CalculatornewPerform arithmetic and bitwise operations on binary numbers.Length ConverterConvert between meters, feet, inches, miles, and more.Temperature ConverterConvert between Celsius, Fahrenheit, and Kelvin.Days Between DatesFind the exact days between two dates, inclusive, exclusive, and in business days.Zakat CalculatorWork out zakat on cash, gold, silver, business assets, shares, property and livestock.Loan / EMI CalculatornewGet your monthly loan payment, a full amortisation schedule, and prepayment savings.

    Utility

    Overview
    QR Code GeneratorCreate customizable QR codes for links, text, and contacts.Timestamp ConverterConvert Unix timestamps to human-readable dates and vice versa.Timezone ConverterConvert times between different timezones worldwide.Countdown TimerCreate countdown timers for events and deadlines.StopwatchPrecise stopwatch with lap times and split tracking.Age CalculatorCalculate exact age in years, months, and days.Essay TimerA countdown timer with a live word count and writing pace, for timed essays and exams.

    Security

    Overview
    Password GeneratorGenerate secure, random passwords with customizable options.Password Strength CheckerCheck password strength and get improvement suggestions.Text EncryptorEncrypt and decrypt text using AES encryption.

    PDF

    Overview
    Image to PDFConvert multiple images to a single PDF document.PDF MergernewCombine several PDFs into one document, in the order you choose.PDF to ImageExtract pages from PDF as high-quality images.Split PDFnewPick pages by thumbnail or range, then extract them into one PDF or a ZIP of separate files.PDF Page OrganizernewDelete, rotate and reorder PDF pages from a thumbnail grid, then download the edited file.

    AI Labs

    Overview
    N-Gram Language Model LabLearn about tokenization, build n-grams, and predict next words.

    Upload anything you like. It never leaves your computer.

    You can drop in photos, PDFs and documents exactly as you would anywhere else. The difference is where the work happens: in this page, using the browser’s own canvas, crypto and PDF engines, instead of on a server somewhere.

    That is why these tools are safe for passport photos, client work and anything you would not hand to a stranger, and why they finish the moment you click.

    Bytes sent to a server
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    Account required
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    Watermark
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    Export limit
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    Works offline
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