OptiSqueezeby Qanen
Fast & Private · No Fear for Privacy

The image compressor that never sees your photos.

OptiSqueeze is a free, private image compressor that runs entirely in your browser. Compress JPEG, PNG, WebP and AVIF — shrink to a target file size, or go lossless — and your photos never leave your device or touch a remote server.

Zero Server UploadsInstant Wasm EngineLossless & Visual Presets

Drop an image anywhere, or browse files

Supports WebP, JPEG, PNG, and AVIF up to 50MB. Processed offline.

Effortless Simplicity

Designed for quiet focus and absolute data sovereignty.

01

Select Your Photos

Drag and drop images directly from your computer or phone. Files stay loaded solely in your local browser sandbox.

02

Instant In-Memory Wasm

Modern WebAssembly algorithms compress visual textures, quantize color palettes, and strip tracking metadata in milliseconds.

03

Save Pristine Results

Compare clarity side-by-side and grab lean WebP, AVIF, or JPEG files ready for blazing-fast websites and messaging.

Compress by format

WebP compressorAVIF compressorJPEG compressorPNG compressor

By file size, and by conversion

Compress to 200KBOr 100KB, 50KB, 20KB, 1MBPassport photo size35×45mm, 2×2in & more — sized, checked, never uploadedWebP to JPGConvert without uploadingAVIF to JPGFor tools that reject AVIF

Guides & deep-dives

WebP vs AVIF vs JPEG: which image format should you use?A practical comparison of WebP, AVIF and JPEG — file size, quality, transparency and browser support — with a simple rule of thumb for choosing the right image format.How to compress images without losing qualityLearn the difference between lossless and visually lossless compression, which quality settings to use, and how to verify results so your images stay sharp while getting smaller.How to compress images online without uploading themMost online image compressors upload your files to their servers. Here's how in-browser (client-side) compression keeps sensitive photos on your device — and when it matters.How to strip EXIF metadata from photos (and why it matters)Photos quietly carry GPS coordinates, camera serials and more in their EXIF metadata. Learn what's inside, the privacy risks, and how to remove it before sharing.How to reduce image file size for a faster websiteImages are usually the heaviest part of a web page. Learn how file size affects Core Web Vitals and the practical steps — resize, format, compress, lazy-load — to speed up.No sign-up image compressors — and which of them still upload your files“No sign-up” and “no upload” are different promises. A comparison of what free compressors actually allow, using each vendor’s own published limits, plus how to verify where your file goes.

Frequently Asked Questions

Never. Image Compressor by Qanen runs 100% on your device. JPEG and WebP are re-encoded by your browser’s built-in canvas encoder, while AVIF and lossless PNG use WebAssembly codecs (libavif and UPNG) loaded locally — no files are ever uploaded. Once the codecs are cached, you can even disconnect your network and the tool keeps working.
WebP is recommended for 95% of use-cases due to universal browser support and outstanding compression ratios. AVIF offers even smaller file footprints for modern browsers, while JPEG provides legacy fallback and PNG stays pixel-perfect. Each format has its own page with settings and guidance.
Use the Lossless preset for pixel-perfect PNG output, or a high-quality WebP (the Balanced preset defaults to quality 82) which is visually indistinguishable from the original at a much smaller size. The built-in comparison slider lets you confirm the quality before you download.
No limits, no subscriptions, and no quotas. Because your device's own CPU and memory handle the calculations, you can compress as many gigabytes of images as your computer hardware supports.