Free Image Compressor (Reduce Size)
Reduce JPG/PNG size by up to 90% in your browser. Secure local compression without server uploads.
β¨ Convert
- Drag and Drop support
- Batch Processing
- Instant Size Comparison
- Auto-optimization
- Individual file download
- Client-side security
π‘ Info
**Benefits of Local Compression** Most sites send your photos to a cloud server. This is risky for private photos. We compress using your browser's engine, so it works offline and is 100% private.
**How much reduction?** Usually, 70-80% quality settings reduce file size by 80-90% with barely noticeable visual difference for web use.
π Usage
- 1
Click 'Select Images' to load photos.
- 2
Adjust compression settings (Default is recommended).
- 3
Download individually or all at once.
Overview
This tool is designed for fast, local processing with no server upload. It focuses on clarity and repeatable results.
When to use it
- β’ When you need a quick result without installing software.
- β’ When you must keep files on your device for privacy.
- β’ When you want a predictable output for reuse or sharing.
How it works
Your file is processed in the browser. The workflow is deterministic and optimized for common document patterns.
Best practices
- β’ Start with a small sample to confirm output expectations.
- β’ Keep file names simple to avoid OS-specific edge cases.
- β’ If results look off, try the tool again after a page refresh.
Common mistakes
- β’ Uploading encrypted or corrupted files without preparing them first.
- β’ Assuming a tool will fix formatting issues outside its scope.
- β’ Closing the tab before the download completes.
β οΈ Limits
- β’ Supported: JPG, PNG, WEBP
- β’ Recommended max 50MB per file
- β’ Speed depends on your device CPU
π₯ Inputs & Outputs
Inputs
- Select Images Formats: jpg, png, webp Β· Multiple
Outputs
- file Formats: jpg, png
π Privacy & Security
- β’ Image processing happens entirely on your device.
π Troubleshooting
I don't see the compressed file.
Once finished, a download button appears. Click it to save.
Transparent PNG turned black.
JPG does not support transparency. Use PNG or WEBP output for transparent images.
It's slow.
Processing many 4K images takes heavy CPU. Try doing fewer at a time.
β FAQ
Is it free?
Yes, completely free.
Are photos saved?
Never. They are processed and deleted from memory immediately.
Does HEIC work?
Currently we support JPG/PNG/WEBP. Please convert HEIC to JPG first.
Does quality suffer?
Default settings are tuned for 'visually lossless' compression.
Bulk limit?
No hard limit, but 50 is recommended.
Mobile support?
Yes, works on iOS and Android browsers.