Choose compression settings that suit your image
Compress JPG, PNG, and WebP images in your browser. Adjust quality and dimensions, compare file sizes, and download JPG or WebP.
Free online tools
Edit images and PDFs, work with text and JSON, calculate percentages and discounts, or use a stopwatch and countdown timer. Free to use, with no sign-up.
Quick start
29 tools available
- CalculatorsPercentage calculatorFind a percentage of a number, a part as a percentage of the total, or a percentage increase or decrease. Compare the result and copy it in your browser.
- CalculatorsDiscount calculatorCalculate a sale price and savings, find the percentage discount from two prices, or work back to the original price. Enter discounts as percent off.
- TimeOnline stopwatchMeasure elapsed time in your browser, pause and resume, record up to 100 laps, and copy lap and total times. Keep the page open and your device awake.
- TimeCountdown timerSet a duration, pause and resume the countdown, and repeat it when finished. Includes sound testing and full screen. Keep the page open for the reminder.
- ImagesImage compressorCompress JPG, PNG, and WebP images in your browser. Adjust quality and dimensions, compare file sizes, and download JPG or WebP.
- PDFMerge PDF filesCombine 2–20 PDFs into one file in your browser. Reorder files before merging, then download your PDF. Up to 200 pages and 50 MiB total.
- ImagesHEIC to JPGConvert one supported HEIC or HEIF photo at a time (input up to 20 MiB). Adjust quality, preview the JPG, and download it in your browser.
- PDFSplit a PDFSplit one PDF by page number. Extract pages into one file, create a PDF per range, or save one file per page. Files are processed in your browser.
- PDFJPG and PNG to PDFCombine JPG and PNG images into a PDF in your browser. Arrange and rotate them, choose A4 or image-sized pages, then download the file.
- PDFPDF to JPGConvert each PDF page into a separate JPG. Supports files up to 20 MiB and 50 pages. Choose a resolution, preview, then download individual JPGs or a ZIP.
- ImagesImage crop and resizeCrop a still JPG, PNG, or WebP image by aspect ratio or exact coordinates, set its output dimensions, and check the result in your browser. Up to 12 megapixels.
- ImagesMerge images into one fileCombine 2–8 still JPG, PNG, or WebP images in a vertical or horizontal strip. Set the order, shared dimension, spacing, and output format in your browser.
- ImagesAdd a text watermark to an imageAdd a single text watermark to a still JPG, PNG, or WebP image. Adjust its position, opacity, angle, size, and outline, then check a PNG or JPG copy in your browser.
- ImagesPixelate or cover part of an imageSelect areas of a still JPG, PNG, or WebP image and apply a mosaic effect or solid cover. Review each edited area before saving a PNG or JPG copy in your browser.
- ImagesPick colors from an imageSelect a point in a still JPG, PNG, or WebP image to read its HEX, RGB, and HSL values, or sample an approximate palette in your browser.
- ImagesPixelate an imageAdd a pixel-block effect to a whole image, compare block sizes, and download a PNG. Learn why pixelation is not a privacy mask.
- ImagesExtract text from an imageExtract text from JPG, PNG or WebP images in your browser. Recognizes Traditional Chinese, Simplified Chinese and English; edit, copy or download the result as TXT.
- ImagesMake a photo collageArrange 2–16 still photos in a grid or large-image layout. Set the canvas ratio, spacing, crop, background, and output format in your browser.
- ImagesSplit an image into tilesSplit one still image into up to 36 tiles. Set rows, columns, crop ratio, output width, and PNG or JPG, then download images individually or as a ZIP.
- ImagesMake a GIF from imagesTurn 2–30 still JPG, PNG, or WebP images into a GIF. Set frame timing, order, size, fit, and playback in your browser.
- ImagesTurn a sprite sheet into a GIFSplit a regular sprite sheet into frames, set their order and timing, then export a GIF or a ZIP of PNG frames in your browser.
- PDFPDF page organizerReorder, rotate or remove pages from one PDF in your browser. Preview thumbnails, undo changes and download a new file without uploading the original.
- PDFAdd a text watermark to a PDFAdd a one-line text watermark to all pages or a page range in one PDF. Adjust placement, color, opacity and angle, preview the result and download it in your browser.
- TextCount words and characters in your textCount characters, Han characters, English words, lines and paragraphs in your text. Compare it with a custom limit and copy the result in your browser.
- TextCompare text line by lineCompare two text versions line by line to find additions and removals. Whitespace is preserved, line endings are normalized, and your text stays in the browser.
- Developer toolsJSON formatter and syntax validatorCheck JSON syntax, format it with 2 spaces, 4 spaces or Tab, or compact it to one line. Copy or download the result. Number tokens and key order stay as written.
- Developer toolsQR code generatorTurn text or a URL into a QR code, preview it, and download a 512, 1,024, or 2,048 px PNG or SVG. Input is limited to 1,000 UTF-8 bytes.
- Developer toolsGenerate a random passwordGenerate a random password in your browser. Set 8–128 characters, choose character types, and copy the result. Check each site's password rules before using it.
- Developer toolsUnix timestamp converterConvert Unix timestamps in seconds or milliseconds to dates, or convert a date back to a timestamp. Choose UTC, Taipei, Tokyo or your device time zone.
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29 tools in 6 categories. Choose a category to browse.
Tool guides
Find practical examples and guidance on each tool page.
Calculators Choose the Right Percentage Calculation
Find a percentage of a number, a part as a percentage of the total, or a percentage increase or decrease. Compare the result and copy it in your browser.
Calculators Check What a Percentage Discount Actually Saves
Calculate a sale price and savings, find the percentage discount from two prices, or work back to the original price. Enter discounts as percent off.
Time Compare Lap Times and Keep Your Results
Measure elapsed time in your browser, pause and resume, record up to 100 laps, and copy lap and total times. Keep the page open and your device awake.
Open a tool in your browser
- Free to use, no sign-up
- Open a tool and get started. No software installation or account is needed.
- Works on phones and computers
- Each tool page includes instructions and examples.
- Light or dark mode
- Switch modes with the button in the header.