Lumagely
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Convert JPG to WebP

Convert JPG and JPEG photos to WebP for smaller files and faster pages — with no visible quality loss. Entirely in your browser.

  • No uploads — 100% on-device
  • Fast in-browser processing · WASM codecs
  • Unlimited files · up to 256MB each

Drop images here

or Browse files

Tip: paste images directly with Ctrl+V

HEIC · PNG · JPEG · WebP · AVIF · GIF · SVG

WebP usually beats JPEG by 25–35% at the same quality, making it ideal for web images and page-speed scores. Lumagely converts your JPGs to WebP on-device with WebAssembly — no upload, full batches supported.

How to convert JPG to WebP

  1. 1Add your JPG/JPEG files.
  2. 2WebP is preselected — choose a quality or a target size if you like.
  3. 3Download each WebP, or the whole batch as a ZIP.

Good to know

  • WebP is supported by every current browser.
  • Use Target file size mode to hit a specific KB limit.

JPG to WebP — questions

Is WebP better than JPG for the web?

Yes. WebP files are typically 25–35% smaller than JPEG at the same quality, which improves load time and Core Web Vitals.

Will I lose quality converting JPG to WebP?

At the default quality the difference is invisible. You can also choose lossless WebP for a perfect copy.

Can I convert a folder of JPGs at once?

Yes — add them all, convert together and download as a single ZIP.

Everything you can do

A complete image toolkit — compress, convert, resize, crop, rotate and watermark — all running privately in your browser.

  • Smart compression

    Shrink PNG, JPEG, WebP and AVIF with WebAssembly codecs — Smart Auto, lossy, near-lossless or fully lossless.

  • Target file size

    Set a limit in KB and Lumagely finds the best quality that fits — ideal for upload caps and email attachments.

  • Convert & HEIC to JPG

    Convert between PNG, JPEG, WebP and AVIF, turn iPhone HEIC photos into JPG, and modernize old GIFs.

  • Resize, crop & rotate

    Resize by pixels or percentage, crop to any aspect ratio, and rotate or flip — across the whole batch.

  • Batch watermark

    Stamp a text or logo watermark onto every image, with full control over position, size, opacity and margin.

  • Private & offline

    Everything runs on your device in Web Workers — no uploads, no sign-up, and it keeps working offline.

Supported formats

Compress, convert and optimize the formats the modern web runs on.

  • HEIC

    Convert iPhone HEIC photos to JPG, PNG, WebP or AVIF.

  • PNG

    Lossless compression with OxiPNG.

  • JPEG

    High-quality photos with MozJPEG.

  • WebP

    Smaller photos & graphics, lossy or lossless.

  • AVIF

    Next-gen format with the best compression for photos.

  • SVG

    Minify vectors, or trace raster images into SVG.

  • GIF

    Convert GIFs to modern, smaller formats.

Why Lumagely?

100% private

Your images are processed on your device and never uploaded to any server.

Fast & modern

WebAssembly codecs (MozJPEG, OxiPNG, libwebp, libavif) run at near-native speed in your browser.

Free & unlimited

No sign-up, no forced watermarks, no limits — optimize as many images as you like.

Browser-based vs. upload-based

Typical upload tools

  • Images are uploaded to a server
  • Sign-up or usage limits are common
  • Often split across separate tools
  • Privacy depends on the provider

Lumagely

  • Images stay on your device
  • No sign-up — unlimited files
  • Compress, convert, resize and social export in one place
  • Private by design — nothing leaves your browser

More image tools

One-tap tools for the most common image jobs — all free, all in your browser.