Do image compression tools upload my photos?

Many do. Tools like TinyPNG and Compress JPEG upload your images to their servers for processing. Client-side tools like brevio use the Canvas API and WebAssembly to compress or convert images locally in your browser.

What is Squoosh and is it private?

Squoosh by Google is an excellent open-source image compressor that runs entirely in the browser using WASM codecs. It is client-side and does not upload images. It has a broader codec range than most tools but no API or bulk support.

Which image tools can I use for confidential or private photos?

For client-side (no upload) image processing: Squoosh, brevio Image Tools, and any browser DevTools canvas export. Avoid TinyPNG, Canva, and similar cloud tools for sensitive images.

Does image conversion (WebP to PNG) require an upload?

No, if you use a client-side tool. The Canvas API can convert image formats entirely in the browser. brevio's image converter, Squoosh, and similar tools do this locally without sending the file to a server.

comparison

Best Free Image Tools That Don't Upload Your Photos (2026)

Last updated: 2 June 2026

Image processing is a common task — compress before emailing, convert a WebP download to JPG, resize for a form upload. The problem: most popular tools (TinyPNG, Canva, Adobe Express) upload your photos to their servers. For personal photos, ID documents, or internal company images, this is worth avoiding. Several high-quality tools handle images entirely in the browser.

Comparison: Image Tools by Privacy

Tool	Upload?	Operations	Free?
brevio Image Tools	No — in-browser	Compress, convert, resize, to PDF	Yes
Squoosh (Google)	No — in-browser	Compress (advanced codecs: AVIF, WebP, MozJPEG)	Yes, open source
TinyPNG	Yes — server upload	Compress JPG/PNG	Freemium
iLoveIMG	Yes — server upload	Compress, resize, convert, crop	Freemium
Canva	Yes — server + cloud storage	Edit, resize, export	Freemium

In-Browser Image Tools on brevio

Compress Image — reduce JPEG, PNG, and WebP file size without uploading
Convert Image — convert between JPG, PNG, and WebP formats
Resize Image — resize to any width with aspect ratio preserved
Image to PDF — combine images into a PDF, one page per image

All tools use the HTML Canvas API and run locally. No account, no file size cap, no watermark.

When to Use Squoosh Instead

Squoosh by Google offers more advanced compression codecs (AVIF, MozJPEG, OxiPNG, WebP 2) and is fully open-source. If you need maximum compression quality or format flexibility beyond JPG/PNG/WebP, Squoosh is the best privacy-respecting option. For straightforward JPG and PNG compression or format conversion, brevio covers the common use cases with a simpler interface.

Frequently Asked Questions

Do image compression tools upload my photos?: Many do. Tools like TinyPNG and Compress JPEG upload your images to their servers for processing. Client-side tools like brevio use the Canvas API and WebAssembly to compress or convert images locally in your browser.
What is Squoosh and is it private?: Squoosh by Google is an excellent open-source image compressor that runs entirely in the browser using WASM codecs. It is client-side and does not upload images. It has a broader codec range than most tools but no API or bulk support.
Which image tools can I use for confidential or private photos?: For client-side (no upload) image processing: Squoosh, brevio Image Tools, and any browser DevTools canvas export. Avoid TinyPNG, Canva, and similar cloud tools for sensitive images.
Does image conversion (WebP to PNG) require an upload?: No, if you use a client-side tool. The Canvas API can convert image formats entirely in the browser. brevio's image converter, Squoosh, and similar tools do this locally without sending the file to a server.