Compress Images Online Free

Frequently asked questions

How do you compress an image online?

Upload your photo (JPG, PNG or WebP) using the button, choose a quality level with the slider, then click compress. You can compare the original and compressed result side by side before downloading. Everything runs in your browser, so no data is sent to any server.

Is image quality reduced?

Compression always involves a trade-off between file size and quality. You control this with the quality slider: lower values give smaller files but more visible loss. We recommend trying 60–80 for a good balance. The preview lets you check the result before downloading.

What formats are supported?

You can upload and compress JPG (JPEG), PNG and WebP images. The compressed output keeps the same format as the original. These formats cover the vast majority of photos and graphics used on the web and in apps.

Are files saved on the server?

No. All processing happens in your browser. Your images are never uploaded to our servers or stored anywhere. You stay in full control of your files from start to finish.

Is there a file size limit?

There is no fixed limit set by the tool. Practical limits depend on your device and browser memory. Very large images (e.g. tens of megabytes) may take longer to process or, on low-memory devices, cause the browser to slow down. For typical photos (a few MB), there are no issues.

What is the difference between JPG and PNG in compression?

JPG uses lossy compression: it discards some detail to achieve much smaller file sizes, which makes it ideal for photos. PNG uses lossless compression: it keeps every pixel intact but produces larger files, and is better for graphics with sharp edges or transparency. For photos on the web, JPG usually gives the best balance of size and quality; use PNG when you need transparency or exact reproduction of logos and UI elements.

How do I compress images for WhatsApp?

WhatsApp automatically compresses photos when you send them, which can reduce quality. To keep control, compress your image first with this tool at a quality you choose (e.g. 75–80), then send the result: the file will be smaller and may be altered less by WhatsApp. Use JPG for photos; avoid sending huge originals so the app does not apply its own heavy compression. The tool runs in the browser, so you can do it quickly from your phone or computer before sharing.

Can I compress multiple images at once?

Yes. You can add several images in one go: use the upload button and select multiple files, or drag and drop a batch. Each image is compressed separately and you can adjust quality per image if needed. When you are done, download each file individually or use the option to download all as a ZIP. Processing runs in your browser, so there is no limit imposed by the tool—only your device memory for very large batches.

Is compression reversible?

No. Lossy compression (as used for JPG and WebP at lower quality) permanently removes some image data; you cannot restore the exact original from the compressed file. If you might need the full quality later, keep a copy of the original before compressing. PNG compression is lossless, so the image can be decoded back to the same pixels, but the file size reduction is smaller. This tool does not store your files, so always keep your originals on your device if you want to revert.

What is the best format for photos on the web?

For most photos on websites and blogs, JPG is still the best choice: it gives small file sizes and good visual quality at 75–85% quality. WebP often produces even smaller files at similar quality and is supported by all modern browsers; use it when you want faster page loads. PNG is better for images with transparency or sharp graphics. Save photos as JPG or WebP for hero images, galleries, and thumbnails; use PNG for logos and graphics with transparent backgrounds.

Why did my file get bigger after compressing?

That can happen when the original is already highly compressed or in a format that does not shrink much at the quality you chose. For example, a low-quality JPG re-saved at 90% may grow because you are asking for more quality than the source contains. Try a lower quality setting (e.g. 65–75) or use a format like WebP, which often gives smaller files at similar quality. Screenshots and simple graphics can also sometimes increase in size when saved as JPG at high quality.

Does compressing an image affect print quality?

It can. Lossy compression (JPG, WebP) removes detail that cannot be recovered. For screen use, 75–85% quality is usually fine, but for large prints or professional use you may notice softness or artefacts. If you need the image for print, keep the quality high (85–95) or keep an uncompressed original. This tool is best for reducing file size for web, email, or social media; for print, prefer minimal compression or lossless formats when possible.