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JPG to WebP

Convert jpg to webp in your browser. Batch up to 50 at a time. No upload, no signup, no watermark. Quality slider for tight web delivery.

Processing mode: Local Browser-local

  • No file leaves your browser
  • Mode: Browser-local
  • 250+ files processed in the last 24h
Waiting for JPG images.

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How to use it

JPG to WebP Converter — Free, In Your Browser

  1. Drop your JPG files onto the workspace, paste from the clipboard, or pick them with the file picker. Up to 50 images per batch, 100 MB per file.
  2. Adjust the quality slider if you want — the default 80 is the conventional balance between visual fidelity and web-delivery weight, similar to what most CDN auto-WebP pipelines target.
  3. Click Convert. Each image decodes through the browser's built-in JPG path, draws into a canvas, and re-encodes as WebP through `canvas.toBlob('image/webp', q)`. Safari does not currently implement that encoder and silently returns a PNG (per the HTML spec's fallback rule). The tool detects the non-WebP MIME on the returned blob and surfaces a clear error rather than writing a misnamed `.webp` file — switch to a current Chrome, Edge, or Firefox to encode WebP. Download individually or grab the whole batch as a single ZIP.

Good for

Common use cases

JPG is the universally compatible delivery format, but WebP is the modern web's compression-density format. WebP typically produces files 25-35% smaller than equivalent JPG at visually indistinguishable quality, which directly cuts page weight, Largest Contentful Paint (LCP), and bandwidth bills for high-traffic sites. The use case for converting JPG to WebP is about web performance and modern-browser delivery — not universal upload compatibility. WebP is supported by every current Chrome, Edge, Firefox, and Safari, but it is still a poor fit for marketplace listings, legacy office software, print-on-demand pipelines, and email attachments where the recipient's reader may not decode WebP. Treat the output of this tool as web-delivery payloads — assets you serve from your own site, your CMS, or a CDN where you control the response and can pair a `<picture>` fallback for browsers that cannot decode WebP. If the goal is to attach an image to an email or upload to a marketplace listing, JPG remains the right format. The conversion happens in the browser, in a single batch of up to 50 images, which keeps unreleased product photography, internal screenshots, and licensed stock images off third-party servers — the JPG source never leaves the tab, the WebP materialises locally, and the only network traffic is the page load itself.

Processing mode

Browser-local

Files are processed by your browser. They never reach our servers.

Questions

JPG to WebP Converter — Free, In Your Browser FAQ

Should I convert JPG to WebP for everything?

No. WebP is for web delivery — assets you serve from your own site, CMS, or CDN, where you control the response and can pair a `<picture>` fallback for any browser that cannot decode WebP. It is the wrong target for email attachments, marketplace listings (Etsy lists `.jpg`, `.gif`, `.png`, `.svg`, and `.heic` as accepted product images, with no WebP in the list), older or locked-down Office installs that may render WebP as a broken-image placeholder, or print-on-demand uploads where Printful, Society6, and Redbubble document JPG and PNG as accepted raster formats. Use JPG when the recipient surface is unknown or compatibility-sensitive; use WebP when you control the delivery and the goal is performance.

How much smaller are WebP files compared to JPG?

WebP typically produces files 25-35% smaller than equivalent JPG at visually indistinguishable quality, with the savings tilted higher on large hero images and lower on small thumbnails that JPG already compresses tightly. Google's WebP study comparing JPEG and WebP at similar visual quality reports a median ~30% file-size reduction. The actual saving on any specific image depends on its content — flat colours and gradients compress more aggressively than fine detail and noise — but for typical photography served from a CMS the savings land in that 25-35% range. Pair the WebP output with a `<picture>` element that falls back to the JPG for any browser that cannot decode WebP, and the page is faster everywhere modern with no regression elsewhere.

What quality setting should I use?

The default is 80, which is a common web-delivery starting point. Many CDN and CMS pipelines expose their own defaults in roughly the 75-85 range or pick a different setting — Cloudflare Images, for instance, documents 85 as its default quality for image transformations. Push to 90 or higher if the source is hero artwork or product photography that needs to look pixel-perfect on retina displays; drop to 60-70 for thumbnail grids and feed images where each pixel is small enough that the compression artefacts are imperceptible. The slider gives you the full 50-95 range so you can match your specific delivery surface — there is no single "correct" number, just a defensible default that you tune from there based on what your delivery target actually serves.

Which browsers can run this WebP encoder?

Canvas WebP encoding through `canvas.toBlob('image/webp', quality)` is supported in current Chrome (since version 50, April 2016), Edge (since the Chromium switch at version 79, January 2020), and Firefox (since version 96, December 2021). Safari does not currently implement the Canvas WebP encoder. Safari renders WebP images via `<img>` perfectly well, but `canvas.toBlob('image/webp', …)` returns a PNG instead — that is the HTML spec's mandated fallback when the requested MIME type is unsupported. The tool detects the non-WebP MIME on the returned blob and surfaces a clear error rather than writing a `.webp` file that is actually a misnamed PNG. The fix is to switch to a current Chrome, Edge, or Firefox.

Is there a file size or batch limit?

Each JPG must be under 100 MB and a single batch can hold up to 50 images. The 100 MB cap protects lower-RAM devices from running out of memory during decode, since the browser materialises the full pixel grid into a canvas before re-encoding. The 50-file cap keeps the ZIP build responsive — for large batches the bottleneck is browser memory, not the conversion itself, since each image processes sequentially. If you need to convert more than 50 images, run the tool twice and stack the resulting ZIPs — the conversion is deterministic, so the second batch produces output identical to what one continuous run would have written.

Will this tool stay free?

The basic workflow is designed to stay free. Paid upgrades later will focus on bigger limits, batch work, OCR, saved presets, and ad-free use.