Image Compressor
Image Compressor. Free, no signup, no watermark. Runs in your browser — your file never leaves your device.
How to image compressor
- Add your image — Drop it onto the box above, or click to open your file picker. On a phone this opens the camera roll directly.
- Run the tool — Press the button. Processing happens on your device and normally finishes in well under a second.
- Download the result — Save the file. The original on your device is untouched — the tool never modifies what you put in.
What this tool does
To use the image compressor, add your image to the tool above and the result is ready to download in a moment. Everything runs in your browser, so nothing is uploaded. The tool is free, needs no account, applies no watermark, and has no daily limit.
What this tool does
Resizing and compressing are the two things people actually need from an image tool, and both are handled here at the image's own resolution using the browser's canvas. Aspect ratio is locked by default, because the most common mistake is stretching an image by editing one dimension and forgetting the other.
Why nothing is uploaded
This tool runs entirely on your own device. Your file is read into memory by JavaScript on this page, processed there, and handed back to you as a download. It is never transmitted to us, which means there is nothing on our side to store, log, leak or forget to delete.
You can verify that yourself: load this page, disconnect from the internet, and the tool still works. That is a different claim from a privacy policy promising prompt deletion, and it is the reason this site exists.
What it costs
Nothing. There is no account, no email capture, no free-trial countdown, no watermark on the output and no daily limit. The site is funded by advertising, which sits below the tool and never between an input and its result.
Supported formats
| Format | Accepted | Notes |
|---|---|---|
| JPG | Yes | Lossy; best for photographs. No transparency. |
| JPEG | Yes | Lossy; best for photographs. No transparency. |
| PNG | Yes | Lossless; supports transparency. Larger files than JPEG for photos. |
| WEBP | Yes | Smaller than both JPEG and PNG at similar quality. Supported everywhere current. |
| GIF | Yes | Limited to 256 colours. Only worth using for animation. |
| BMP | Yes | Uncompressed and very large. Convert it to almost anything else. |
| TIFF | Yes | Common in print and scanning workflows. Often multi-page. |
| AVIF | Yes | Smallest of the modern formats. Not decodable in every browser yet. |
| HEIC | Yes | Default on recent iPhones. Decoded to JPEG or PNG before processing. |
| HEIF | Yes | Default on recent iPhones. Decoded to JPEG or PNG before processing. |
| SVG | Yes | Vector, so it scales without loss. Rasterised when converting to a pixel format. |
| ICO | Yes | Windows icon container; holds several sizes in one file. |
Getting a better result
If the compressed image looks soft, the original had probably already been compressed once. Re-compressing a JPEG compounds the artefacts of the first pass. Where you still have the camera-roll original rather than a copy forwarded through a messaging app, start from that — messaging apps strip a great deal of quality before you begin.
Screenshots and images containing text behave differently from photographs. JPEG smears sharp edges, so text goes fuzzy well before photographic detail does. Where the upload form accepts PNG, a resized PNG will usually read more cleanly than a heavily compressed JPEG of the same content.