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Image Compressor: Reduce Image File Size Online

Large images slow down websites, fill inboxes and fail upload limits. Filenivo’s image compressor reduces the file size of your pictures so they load faster and are easier to share, while keeping them looking good on screen.

Drag & drop your images here

or

JPG · PNG · WebP · Unlimited files · No file size limit

🔒 Your files are processed locally in your browser and are never uploaded to a server. There is no limit on file size or number of files. The best JPG/WebP encoders are loaded once from a public CDN when needed.

All Compressor Tools

Frequently Asked Questions

Lossy compression can remove a small amount of detail. At moderate settings the difference is usually hard to
see, and you can compare the result with your original before using it.

There is no single rule, but many website photos work well under a few hundred kilobytes. Smaller is faster,
especially on mobile connections.

For photos, WebP and AVIF usually compress better than JPG. For graphics with flat colors, PNG or WebP often
works well.

Yes. Compressing before sending helps you stay under attachment limits, which are often around 20-25 MB in
total.

Why Use FileNivo?

  • 100% Free to Use
  • No Registration Required
  • Files Never Leave Your Device
  • Super Fast Conversion
  • Works on Any Device

How to Compress an Image

1. Upload your image by clicking the upload area or dragging the file onto the page.
2. Choose the compression level if options are available.
3. Start the compression and compare the result with your original.
4. Download the smaller file.

Lossy vs Lossless Compression

Lossless compression shrinks a file without discarding any image data, so the picture is identical to the original.
Lossy compression removes details the eye is unlikely to notice, which makes files much smaller. Lossy suits
photos, while lossless suits logos, screenshots and graphics with text.

Tips to Get Smaller Images Without Obvious Quality Loss

  • Resize the image to the size you actually display. A 4000 pixel photo shown 800 pixels wide wastes bandwidth.
  • Use JPG or WebP for photos and PNG for graphics with transparency.
  • Try WebP or AVIF for websites; they are often much smaller than JPG and PNG.
  • Compare before and after at 100% zoom, since small differences are easier to spot there.
  • Keep your original file in case you need to compress it again from scratch.