Image Compressor – Reduce Image File Size Online

Make JPG, PNG and WebP images smaller without changing their dimensions. Use Automatic for a good balance or Manual to choose the quality yourself, then compare before and after. Your image is compressed in your browser, never uploaded.

Drop an image to compress

Choose image

JPG, PNG, WebP · up to 50.00 MB · one image at a time · or paste with Ctrl+V

Processed in your browser. Your image is not uploaded.

How to compress an image

Choose, drop or paste a JPG, PNG or WebP image. Automatic mode compresses it straight away.
Check the result: the original size, the new size and the percentage saved are shown side by side.
For more control, switch to Manual and adjust the quality (JPG and WebP) or the number of colours (PNG), or change the output format.
Download the compressed image.

How Image Compression Works

A compressed image has the same width and height as before, but it's stored more efficiently. Lossy compression throws away detail your eyes are unlikely to notice, such as tiny colour variations in a sky. Lossless compression only finds a shorter way to write the same pixels. This compressor uses lossy settings by default because they save far more; the only fully lossless option is PNG with Lossless selected in Manual mode. Different formats get smaller in different ways, so the same setting doesn't behave identically for all of them.

Compress JPG and JPEG Images Online

JPG and JPEG are the same format, so there's nothing different to do for a .jpeg file.

JPG compression is lossy. The quality setting controls how much fine detail is simplified: high settings keep images looking identical to the eye, while low settings produce visible blockiness, especially around edges and text. Re-saving a JPG that was already compressed gives smaller savings than compressing a camera original.

Compress PNG Images Online

PNG is lossless, so it can't simply be “saved at lower quality”. To shrink it, the compressor reduces the image to a palette of at most 256 carefully chosen colours (the same idea as tools like pngquant). Savings are usually largest for screenshots, graphics and illustrations. It is lossy, though often hard to notice. Choose Lossless in Manual mode to keep every pixel exactly, with smaller savings. If your PNG is actually a photo, it will shrink far more as a JPG: use PNG to JPG. Going the other way, JPG to PNG makes files bigger, not smaller; it's for editing without further loss.

WebP

WebP uses modern lossy compression and supports transparency. Converting a PNG photo to WebP is frequently the biggest single saving available. Nearly all current browsers display WebP, but some older software and upload forms still only accept JPG or PNG.

Features

Automatic mode with sensible defaults, or Manual mode with full control.
Real colour-palette compression for PNG, with transparency preserved.
Keep the original format or convert to JPG or WebP while compressing.
Exact before and after sizes, with an honest warning when the result isn't smaller.
Dimensions are never changed, and metadata such as GPS location is removed from the output.

Reduce Image Size Online

“Image size” can mean the file size in KB or MB, or the dimensions in pixels. This tool reduces the file size and leaves the dimensions alone. If a photo is several thousand pixels wide, reducing the dimensions with the image resizer usually saves more than any quality setting, and the two work well together. Common reasons to compress:

Speeding up a website: smaller images load faster, especially on mobile data.
Fitting under an email or upload size limit.
Saving storage when archiving many screenshots or scans.
Sharing photos over slow connections.

Photo Size Reducer

Application portals, email services and websites often cap uploads at a fixed size. Automatic mode is a good first try for a photo; if the result is still above the limit, a target-size tool is quicker than adjusting quality by hand, because it tests settings until the file fits.

Using it as a JPG size reducer

For a JPG photo, Manual quality between 75% and 85% typically cuts the file substantially with little visible change. Below about 60%, blockiness starts to show around edges and text. When a form names an exact limit, go straight to resize image to KB.

Tips for smaller files

Very large photos? Resize the image to the size it will actually be displayed first; this usually saves more than any quality setting.
Have a strict limit such as 50 KB or 100 KB? Reduce an image to an exact KB size instead of guessing quality settings. For the most common limits there are one-step pages: compress to 20KB, 50KB, 100KB and 200KB.
Photos saved as PNG are often several times larger than needed. Convert the PNG to JPG if you don't need transparency.
Compress from the original whenever possible. Each lossy re-save loses a little more detail.

Privacy: your image stays on your device

Compression happens on your device using your browser's own image encoders. Your image isn't uploaded, so even private or sensitive images never leave your computer or phone.

Read the privacy policy or see how the tools work for details.

Frequently asked questions

Is this image compression lossless?

Not by default. JPG and WebP compression is lossy: it discards fine detail that is hard to see. PNG compression reduces the number of colours, which is also lossy unless the image already has 256 colours or fewer. For PNGs you can choose Manual and Lossless, which keeps every pixel but usually saves only a little.

Why is my compressed image not smaller?

Some images are already heavily compressed, for example photos saved by messaging apps or exported at low quality. Re-compressing those can't remove much more. The tool tells you when this happens so you can keep your original, lower the quality in Manual mode, convert to WebP, or reduce the dimensions.

What quality setting should I use for JPG?

For most photos, 70–80% looks almost identical to the original at a fraction of the size. Automatic mode uses 75%. Go to 85–90% for images with text or fine patterns, and only go below 50% when file size matters much more than appearance.

How do I compress an image to a specific size, like 100 KB?

Use the Resize Image to KB tool. Instead of a fixed quality, it searches for the highest quality that fits under your target and reduces dimensions only if quality alone isn't enough.

Does compression change the image dimensions?

No. The compressor keeps the width and height exactly the same and only changes how the pixels are stored. To change dimensions, use the image resizer.

How is PNG compressed?

PNG is a lossless format, so the only way to make a PNG much smaller is to store fewer distinct colours. The compressor picks the best palette of up to 256 colours for your image and uses light dithering so gradients stay smooth. Transparency is preserved.

Are my images uploaded?

No. Compression runs in your browser on your own device. The image isn't sent to a server, and nothing is stored once you close the page.