Image compressor

Automatically choose effective settings for JPEG, PNG, WebP, AVIF, HEIC and more, entirely on-device.

About Image compressor

Automatically choose effective settings for JPEG, PNG, WebP, AVIF, HEIC and more, entirely on-device.

How to Compress Images Locally in Your Browser

Reduce picture file sizes in 3 simple steps without uploading private photos.

  1. 1Drop or select your local image file.
  2. 2Review the automatic compression preview and compare before/after file sizes.
  3. 3Click Download to save the compressed image directly on your computer.

Tool facts

Processing
Runs locally in your browser. Source files are not uploaded to NanoPix for editing.
Available controls
Import JPEG / PNG / WebP / AVIF / HEIC and more · Keep the source format when possible (unsupported formats fall back to PNG) · Choose compression settings automatically and resize only when needed · Compare file sizes and download
Output
Export the compressed image

Frequently asked questions

What can Image compressor do?
Automatically choose effective settings for JPEG, PNG, WebP, AVIF, HEIC and more, entirely on-device.
Does image compression noticeably degrade visual sharpness?
NanoPix applies perceptual compression algorithms that strip redundant metadata and color artifacts imperceptible to the human eye. PNGs undergo lossless index optimization, while JPEG/WebP/AVIF files typically reduce file size by 60%–85% while retaining crisp clarity.
What image formats can be compressed locally? Does it support iPhone HEIC?
Yes. It supports JPEG, PNG, WebP, AVIF, BMP, and Apple HEIC/HEIF files. All decoding and re-compression run 100% locally via browser APIs and WebAssembly without cloud upload.
Are my files uploaded to your servers?
No. NanoPix runs in your browser with WebAssembly. Your video, audio, or image files stay on your device—we never receive them.
Is browser-based editing private?
Yes. Processing happens locally on your machine. Nothing is sent to NanoPix servers for encoding or storage.
Is this tool free?
Yes. NanoPix tools are free to use in a modern browser. No account is required for basic editing and export.