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Convert Image to WebP in Bulk

Convert any image to WebP free — up to 35% smaller files from JPG, JPEG, PNG, or PDF, with nothing ever leaving your browser.

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Convert JPG, JPEG, PNG, PDF images to WEBP format online.

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100% Free & no login required. Your images never leave your device.

How It Works

Step-by-step guide to convert JPG, PNG, or JPEG images to WebP format online

Upload Your Images

Select one or more JPG, JPEG, PNG, or PDF files from your device. You can upload up to 12 files at once — no account needed, no per-session limits.

Convert Image to WebP

Your images are converted to WEBP entirely in your browser. WEBP delivers 25–35% smaller file sizes than JPG at equivalent quality — ideal for faster-loading pages and lower bandwidth costs.

Download Your WEBP Files

Download your converted WEBP images instantly. Nothing is sent to any server — your photos stay on your device, safe for sensitive content and private photos.

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Why Choose Imresizer?

Fast, secure, and completely free image resizing

  • Bulk Convert to WEBP

    Upload up to 12 JPG, JPEG, PNG, or PDF files and convert them all to WEBP in one step. PDF pages each become a separate WEBP image. No need to process files one at a time — batch your whole set and download a ZIP.

  • 100% Free, No Signup

    No account, no watermark, no hidden limits. Convert as many batches as you need to WEBP at no cost — and you'll never be asked for an email address.

  • Private — Nothing Leaves Your Device

    Every conversion runs entirely inside your browser. Your images never touch a server, which makes this safe for private photos, business assets, and anything sensitive.

  • JPG and JPEG to WEBP

    Convert JPG and JPEG photos to WEBP for files that are typically 25–35% smaller at the same visual quality. A practical win for any website trying to pass Core Web Vitals.

  • PNG to WEBP

    PNG files with transparency convert to WEBP with the alpha channel intact. You get significantly smaller files without losing the transparent background your design depends on.

  • Lightning Fast

    No upload queue, no server round-trip. Client-side processing converts your entire batch in seconds — even on a slow mobile connection.

  • Works on Any Device

    Convert JPG, JPEG, PNG, or PDF to WEBP on your phone, tablet, or desktop — no app install needed, just open the page in any modern browser.

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Testimonials

What Our Users Say

Trusted by thousands of users worldwide since 2015

“
Converted all my blog post images from JPG to WEBP in one batch. Page load time dropped and I didn't upload a single file to any server.
“
Fast and private. Exactly what I needed.
“
I convert product photos to WEBP before uploading to our store. The file sizes are noticeably smaller and the quality looks identical.
“
Had 40 PNG icons to convert. Dropped them all in, got a ZIP of WEBP files back in seconds. Free, no login, no nonsense.

Frequently Asked Questions

Everything you need to know about image resizing

How do I convert an image to WebP for free?

Upload your JPG, JPEG, PNG, or PDF files using the button above — up to 12 at once — and download the WebP results in seconds. Everything runs inside your browser, so there's no account, no payment, and no watermark. For PDFs, each page becomes its own WebP image.

Can I convert an image to WebP without uploading it?

All conversion happens entirely inside your browser, so your image never gets uploaded or sent to any server. That makes it safe to convert sensitive photos, business assets, or any image you'd rather not hand to a third party.

Does converting to WebP change my image dimensions?

Converting to WebP only changes the file format and compression — your image keeps its original width and height. If you also need to resize, run the output through the Resize Image tool, or compress it further to hit a specific KB target.

Which formats can I convert to WEBP?

You can convert JPG, JPEG, PNG, and PDF files to WEBP. All four formats are fully supported and processed client-side. PDF pages are each exported as a separate WEBP image. If you have a mix of file types in one batch, just upload them all together.

Can I convert a PDF to WEBP?

Yes. Upload your PDF and the tool converts each page into its own WEBP image. This is handy when you want to embed individual pages on a webpage or share them as lightweight images. Everything runs in your browser — no file leaves your device.

Why should I convert JPG, JPEG, or PNG to WEBP?

WEBP files are typically 25–35% smaller than equivalent JPG images and up to 80% smaller than PNG, with no visible quality loss. Smaller files mean faster page loads, lower bandwidth costs, and better scores on Google's Core Web Vitals — which affects search rankings.

Does converting PNG to WEBP keep the transparent background?

WEBP supports alpha-channel transparency, just like PNG. When you convert a PNG with a transparent background to WEBP, the transparency is preserved. It's one of the reasons WEBP is a better replacement for PNG than JPG is.

Is WEBP supported by all browsers?

All modern browsers — Chrome, Edge, Firefox, Safari (version 14 and later), and Opera — support WEBP. If you need to support very old browsers or email clients that don't render WEBP, keep a JPG fallback. For any standard website built today, WEBP is safe to use.

Can I convert multiple images to WEBP at once?

You can upload up to 12 JPG, JPEG, PNG, or PDF files at once and convert them all to WEBP in a single step. Converted files download as a ZIP archive so you get everything in one click.

Is there a difference between JPG and JPEG when converting to WEBP?

JPG and JPEG are the same format — JPEG is the full name, JPG is the three-character file extension that became standard on Windows years ago. Both convert to WEBP identically. You can mix .jpg and .jpeg files in the same batch without any issues.

Do I need to sign up or pay to convert images to WEBP?

There's no signup, no email required, no watermark, and no payment. The full tool is free to use as many times as you like — including bulk conversion and unlimited sessions.

Will my images lose quality when converted to WEBP?

WEBP uses lossy compression by default, similar to JPG, but it's more efficient — so at the same file size, WEBP looks sharper. For most web images, the quality difference is invisible. If you need lossless output, WEBP also supports a lossless mode that matches PNG quality exactly.
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