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AI Image Upscaler

Make small or low-resolution images bigger and sharper. The AI model adds realistic detail instead of the blur you get from normal resizing, entirely on your device.

  • Never uploaded
  • Free, no sign-up
  • No watermark
  • Works on phones
  • Works offline after one download

Your files are processed on your device and never uploaded.

Enlarge by

Runs an AI model on your device (2.4 MB, downloaded once). Inputs up to 2 megapixels.

    Works offline after one download.

    See what it does

    A small, blurry photo of a man’s face, enlargedBefore: Original, 224 px wide
    The same face upscaled 4 times, with sharper eyes, hair and beardAfter: Upscaled 4×, 896 px wide
    Made with this tool: 224 × 300 px enlarged to 896 × 1200 px. Close-up of the face; the “before” side is the small photo enlarged normally. The person in this example is AI-generated.

    How to upscale an image

    1. Add your images by dropping them above or tapping to choose.
    2. Choose 2× or 4×. The first run downloads the AI model (2.4 MB) once.
    3. Wait for the progress to reach 100%, compare before and after, then download.

    Why use Picsawa

    • Private by designFiles are processed on your device and never uploaded.
    • Free, no sign-upNo account, no watermark and no daily limits.
    • Works everywherePhones, tablets and computers, in any modern browser.
    • Batch friendlyProcess up to 50 images at once and download a ZIP.

    About the AI Image Upscaler tool

    The upscaler uses Real-ESRGAN (general model), a well-known super-resolution network that removes blur and compression artifacts while enlarging. It runs on your graphics chip through WebGPU or WebGL, with a CPU fallback for small images.

    Images are processed in tiles, so even large outputs fit in memory. Inputs up to 2 megapixels are supported (about 0.1 megapixels on devices without graphics acceleration).

    Frequently asked questions

    How is this different from resizing?

    Normal resizing stretches pixels, which looks blurry. The AI model predicts the missing detail, giving sharper edges and cleaner textures.

    How long does it take?

    Usually 5 to 60 seconds per image, depending on its size and your graphics chip; a progress percentage is shown. Without graphics acceleration it is much slower, so only small images are accepted.

    Should I choose 2x or 4x?

    4x gives the biggest result for very small images like icons or old photos. 2x is faster and is often enough for printing or sharing.

    Are my images uploaded?

    No. The AI model is downloaded to your browser and runs on your device. Your images never leave it.