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FileNimble

Image Compressor

Shrink image file size with real-time quality control. Fast, private, and 100% browser-based.

Runs in browser

Drop files here or click to upload

Supported formats: .jpg, .jpeg, .png, .webp

Choose Files
Max 50 MB per file•Up to 20 files
100% Private — Processed locally in your browser

Limit: 24 megapixels and 16,384 pixels per side. Still images only; animation and metadata are not retained. Output size may increase. Files stay on this device.

Lossless PNG vs Lossy Compression

PNG is a lossless format, which means browser canvas encoders use lossless output encoding and ignore lossy quality sliders. When compressing PNG images, FileNimble gives you the choice to keep them as lossless PNGs or convert them to modern WebP for lossy encoding while preserving transparency.

How to Compress Images

Optimize your images in seconds with zero loss of visible clarity.

1

Upload Files

Select or drop your JPG, PNG, or WebP images into the uploader.

2

Adjust Quality

For JPEG or WebP, adjust quality (80% default) and inspect the result. PNG uses lossless encoding without a quality slider.

3

Download Optimized

See the real percentage saved and download your files individually or as a ZIP.

Common Questions

Frequently Asked Questions

How does browser-side image compression work?

FileNimble passes your quality setting to the browser JPEG or WebP encoder. Lower quality can discard visible detail. Actual output can be smaller or larger; compare the generated result before keeping it.

Can PNG files be compressed using a quality slider?

No. PNG is strictly a lossless format. Standard browser encoders do not support lossy quality reduction for PNG. If you need substantial file size reductions for PNGs, FileNimble offers the option to convert them to lossy WebP, which supports transparency. Savings depend on the image and are not guaranteed.

Are percentage savings estimated or real?

All savings shown on FileNimble are calculated directly from the real output file size compared to the original input file size (never estimated or faked).

Are my images uploaded to any server?

No. The entire compression process runs locally on your computer inside your web browser. Your files remain completely private.

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