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Solution

Compress images in your browser with local WebAssembly processing

ConV uses WebAssembly (WASM) compiled codecs — the same production-grade libraries (MozJPEG, libwebp, libavif, libpng) used by server-side image processing tools — running entirely in your browser tab.

No uploadsLocal WASMEXIF/GPSWebP & AVIF
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Web Workers distribute encoding across CPU cores to keep the interface responsive. You get professional compression quality without installing software, without uploading files, and without depending on a cloud service.

The entire processing pipeline is client-side. Close the tab and no trace remains on any server.

Atouts majeurs

  • Production-grade WASM codecs: MozJPEG, libwebp, libavif, libpng
  • Web Workers for parallel, non-blocking encoding
  • No installation, no plugins, no software
  • Zero upload — fully client-side pipeline

Usages fréquents

  • Developers who want professional codec quality in a browser tool
  • Teams who cannot install software on managed devices
  • Privacy-conscious users who verify no network requests carry image data
  • Users on multiple devices needing a consistent cross-platform tool

Fonctionnement

  1. 01

    Browser loads WebAssembly codec modules on first use

  2. 02

    Web Workers initialize codec instances in parallel threads

  3. 03

    Encoding runs in worker threads — UI remains responsive

  4. 04

    Encoded files are written to browser memory and offered for download

Limites réalistes

WASM module load adds a brief startup time on first use (~1–3 seconds for codec initialization). Very large images may exceed browser memory limits on constrained devices.

FAQ

What is WebAssembly (WASM) image compression?

WebAssembly lets production C/C++ codecs run in browsers at near-native speed. ConV uses WASM builds of MozJPEG, libwebp, and libavif — the same libraries used in server-side pipelines.

Does this run offline?

Once WASM modules are loaded, ConV can process images without a network connection.

How does browser-based compression compare to desktop software?

WASM codecs achieve near-identical output to their native equivalents. ConV's compression quality matches tools like ImageOptim or command-line MozJPEG.

Is this suitable for professional use?

Yes. ConV uses the same codecs as production image processing infrastructure. The outputs meet professional web publishing standards.

Solutions liées

No-upload image optimizer for private workflows

Most image optimizers send your files to a remote server. ConV takes a different approach: the entire compression pipeline runs inside your browser using WebAssembly.

Convert images to AVIF locally in your browser

AVIF is the next-generation image format backed by the Alliance for Open Media. It achieves 30–50% better compression than JPEG at comparable visual quality and often outperforms WebP.

Compress multiple images locally and export them as ZIP

Processing images one at a time is impractical for agencies, content teams, and e-commerce workflows. ConV's batch mode handles dozens of images in a single session with parallel encoding and ZIP export.

Prêt à tester ?

Plan gratuit sans compte. Export ZIP avec limites du gratuit — tarifs.

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