Free Online Image Compressor — Reduce JPG/PNG Without Quality Loss

Features

Reduce JPG and PNG file sizes up to 80%
Live quality slider with before/after preview
Batch compression — drop multiple images
No file size limits
Fully client-side — images never uploaded
No watermarks
Works offline after first load

How it works

Open freeimagecompressor.app
Drop images or click to select
Adjust quality slider while seeing live preview
Download compressed versions

Common use cases

Reducing image size before emailing
Optimizing photos for website use
Shrinking images to fit message attachment limits
Creating smaller versions for social media uploads
Reducing asset sizes in apps and presentations

How it compares

TinyPNG uploads your images and has a free-tier file size limit. ImageOptim is macOS-only. Squoosh (Google) is fully client-side and excellent for advanced tuning but has more complexity. Freeimagecompressor is simpler for everyday compression and works on any platform.

Privacy

Images are compressed in your browser with the Canvas API. Nothing is uploaded.

Frequently asked questions

Is Freeimagecompressor really free?

Yes. No signup, no limits, no watermarks.

How much can I reduce file size?

60-85% for typical JPG photos without visible quality loss. PNG with transparency: 40-70%.

Are images uploaded?

No. Everything happens in your browser with the Canvas API.

Can I compress multiple images at once?

Yes. Drop multiple images and apply a single quality setting to all.

What formats are supported?

JPG, PNG, and WebP. Output is typically JPG or PNG depending on whether transparency is needed.

Does it work on mobile?

Yes. Fully responsive and installable as a PWA on iOS and Android.

Free Image Compressor — reduce file size without quality loss