Otaku Dojo Tools
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Image Resizer

The Image Resizer changes the size of many images at once: set a width or height to scale proportionally, scale by percentage, or set an exact size such as 1200×630 for social sharing. Keep the original format or convert to WebP, JPG or PNG at the same time. Resizing uses the browser's high-quality Canvas resampling, so your images never leave your computer.

  • Free
  • No sign-up
  • Runs in your browser
Resize by
Format
Choose or drop files to start

    How to use the Image Resizer

    1. Choose how to resize — by width, height, percentage or exact size — and enter the value.
    2. Choose the output format: keep the original or convert to WebP, JPG or PNG.
    3. Drop images into the dashed box or click to choose files (multiple allowed).
    4. Download them one by one or press "Download all"; changing settings re-processes automatically.

    Examples

    Phone photo to blog width

    Input
    IMG_2048.jpg (4032×3024) | width 1200
    Output
    IMG_2048-1200x900.jpg (1200×900)

    Social sharing image size

    Exact size stretches the image; crop it to the same aspect ratio first to avoid distortion.

    Input
    cover.png | exact 1200×630
    Output
    cover-1200x630.png

    Common image sizes

    Social share (Open Graph)1200 × 630
    Instagram post1080 × 1080 (square), 1080 × 1350 (portrait)
    YouTube thumbnail1280 × 720
    Blog images1200–1600 px wide balances sharpness and file size

    Specs & key facts

    ModesBy width, by height (proportional), by percentage, exact size
    OutputOriginal format, WebP, JPG, PNG
    Maximum10,000 px per side
    BatchMultiple files, download all
    PrivacyProcessed with Canvas in your browser; EXIF data is removed
    PriceFree, no sign-up

    FAQ

    Will resizing make my image blurry?

    Downscaling usually stays sharp thanks to high-quality resampling. Enlarging beyond the original size always softens the image because detail cannot be invented.

    If I only set the width, how is the height chosen?

    Width mode keeps the aspect ratio: 4032×3024 resized to 1200 wide becomes 1200×900.

    Can I crop to a square?

    Cropping is not available yet. "Exact size" stretches the whole image, which distorts it if the ratio differs.

    Are my images uploaded?

    No. Everything happens in your browser.