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Compress Image

Trade a little quality for a much smaller file, with the size shown live.

Runs in your browser FreeNo sign-in Works without JavaScript

Choose your file

Accepted: JPG, JPEG, PNG, WEBP, GIF, BMP.

Below about 50 the edges of text start to smear.

Start over

With JavaScript on, this runs in your browser and nothing is uploaded.

How to use compress image

  1. Choose your image files file. Drop the file onto the upload area or pick it from your device. The file is read straight into your browser and is not uploaded anywhere.
  2. Set the options. Adjust the settings shown for compress image. The defaults suit most files, so you can usually leave them alone.
  3. Check and save the result. Run the tool and download the JPEG result. Compare it against your original before you rely on it — conversions do not always carry every detail across.

Privacy

By default this page does the work itself and your file never leaves the device. If JavaScript is unavailable, the form posts to the server instead, where the file is processed in a temporary folder and deleted as soon as the result is written. The result link works once and expires.

Questions

What happens to my file?

By default nothing leaves your device — the tool runs in your browser. If JavaScript is unavailable the same page falls back to a server form, where the file is processed in a temporary folder and deleted the moment the result is written.

Will the JPEG result match my image files file exactly?

Not always, and it is worth knowing why. Resizing or re-saving a lossy image reprocesses the pixels, so quality is lost each time. Editing repeatedly from the same original avoids compounding it. Check the result against your original before relying on it.

Will this reduce the quality of my image?

Only where the format requires it. Lossless formats such as PNG survive processing unchanged, while JPEG is re-encoded and loses a little detail each time it is saved. Where quality matters, work from your original rather than from a file that has already been through several rounds.

Is there a file size limit?

In your browser the limit is your device memory rather than a fixed number. If the page falls back to the server — with JavaScript switched off — uploads are capped at 32 MB.

Working with image files and JPEG

About image files

Raster images store a grid of pixels. The format decides how that grid is compressed and what extra information travels with it.

Resizing or re-saving a lossy image reprocesses the pixels, so quality is lost each time. Editing repeatedly from the same original avoids compounding it.

About JPEG

A lossy photographic format that discards detail the eye is least sensitive to in exchange for small files. Excellent for photographs.

It has no transparency, and every save loses a little more detail. Sharp edges, flat colour and text develop visible artefacts, so screenshots and diagrams belong in PNG.

Troubleshooting

  • Nothing happens after choosing a file. Check the file really is IMG — a renamed extension fails here the same way it fails in other readers.
  • The upload is refused. Files over 32 MB are rejected. Split the document first, or use one of the browser-side tools, which are limited only by your device memory.
  • The result looks different from the original. Some conversions cannot carry every feature across formats. The page says what was dropped when that happens.