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Image Converter

Convert one image or a whole batch to JPG, PNG, WebP, ICO or BMP.

JPG, PNG, WebP, AVIF, GIF, BMP, SVG, ICO — HEIC and TIFF where your browser supports them. You can also paste.

Processed on your device. Files are never uploaded.

Which format?

  • JPG — photos, universally supported, no transparency.
  • PNG — lossless; screenshots, logos, anything with sharp edges or transparency. Large for photos.
  • WebP — typically 25–35% smaller than JPG at the same visual quality, supports transparency. Supported by all current browsers and most apps.
  • AVIF — smaller still and increasingly common as a download format. It can be read here and converted to the formats above; browsers can't yet create AVIF files themselves.
  • ICO — Windows icons and website favicons. The icon contains 16, 32, 48 and 256-pixel versions, each resampled from your image; non-square images are centred on a transparent square.
  • BMP — uncompressed 24-bit bitmap, for old software that needs it.

Good to know

  • Metadata is removed. Converted files don't carry EXIF data such as camera details or GPS location, which is usually what you want before sharing. Phone photos are rotated upright first.
  • Transparency is kept for PNG, WebP and ICO. For JPG and BMP, transparent areas are filled with white or black.
  • Animated GIFs are converted using their first frame.
  • Max size scales down anything larger than the chosen size on its longest side with high-quality (Lanczos) resampling — a quick way to make phone photos small enough for email or a website. For exact dimensions use Reduce image resolution.
  • Each result shows its new size, so you can compare formats. Converting an already-compressed JPG to PNG makes it larger, not better.

Are my files uploaded?

No. Conversion runs with JavaScript and WebAssembly running in your browser tab. Your files are read from your device and the results are created on your device; nothing is sent to gratistools.be or anyone else, which is also why there are no queues, daily limits or watermarks. See the privacy page.