Compress Image Free — Compress JPG, PNG & JPEG Privately
Compress JPG, PNG, or JPEG images in your browser. Reduce file size without losing quality. Free image compressor — no upload, no signup.
Image Compress
Drop an image or click to select
All processing happens in your browser. No files are uploaded to any server. How to verify
Compressing images for the web is a common task — but most online compressors require you to upload your image first. For confidential mockups, unreleased designs, personal photos, or anything sensitive, that's a privacy concern.
Pulsyr's image compressor runs entirely in your browser using the Canvas API. Your image is processed on your device, the smaller version is generated locally, and you download it. Nothing is ever uploaded.
Why this is actually private
- ✓Compression happens via HTML Canvas in your browser — no server roundtrip.
- ✓Original and compressed versions both stay on your device.
- ✓Works offline once the page is loaded.
- ✓No tracking, no analytics, no third-party scripts on the compressor.
Cmd+Option+I on Mac, F12 on Windows), go to the Network tab, then use the tool above. You'll see zero network requests during the conversion. Most online tools can't make this claim because they upload your file to do the work.How to use
- 1Drop your image into the upload area.
- 2Adjust the quality slider if you want (default is usually fine).
- 3Click Compress. The smaller version is generated locally.
- 4Download the compressed file.
Who this is for
Web designers
Compress client mockups before sharing — keep unreleased designs off public servers.
E-commerce product photos
Reduce photo sizes for faster page loads without exposing your catalog to a third party.
Personal photos
Compress family photos or private albums before sharing without uploading them anywhere.
Email attachments
Shrink images to fit email size limits without the privacy risk of an online compressor.
Frequently asked questions
How much can I compress an image?▼
Typically 50-80% size reduction with minimal visible quality loss. The exact ratio depends on the image — photos compress more than illustrations.
Will the compression upload my image?▼
No. The Canvas-based compression runs entirely in your browser. Your image never leaves your device.
Does it work for PNG with transparency?▼
Yes. PNG transparency is preserved during compression. JPGs don't support transparency by default.
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