Local privacy, ready in seconds

Lighter images.
Ready for the web.

Compress and convert to WebP directly in your browser. Start with a free batch of up to 50 images; a free account takes you to 100.

Processed in your browserOptimized WebPUp to 50 images, free

Optimize your images

Choose images, prepare lighter WebP copies, and download them when ready. Everything stays in your browser.

Upload images to optimize

Drag photos here or choose files from your device. Start with up to 50 images, then choose whether to move to batches of 100.

Your images stay in the browser and are never uploaded to a server.

Supported: JPG, PNG and WebP

Less weight, more speed

Reduce file size before uploading to a site, sending, or publishing images.

WebP without the fuss

Create WebP copies with a clear preset: smaller, balanced, or high quality.

Your photos stay yours

Processing happens on your device: no image goes through our servers.

How it works

Three steps. No server waiting.

Choose images, set the result you need, and download the new copies. The originals are never changed.

Upload images

Add JPG, PNG, or WebP from your computer or phone.

Choose the result

Use a preset and, if needed, set the image's maximum dimension.

Download the copies

Compare file size right away and download the file or a ZIP for a batch.

When to use it

Optimize before publishing, not after.

Heavy images slow down pages, take up storage, and make sharing many files awkward. A WebP copy is often the right format to prepare for the web.

We never alter the original: we create a new file so you can compare the result and choose which one to use.

Sites, blogs, and portfolios

Prepare lighter images before placing them on a web page.

E-commerce and catalogs

Lighten a group of product photos and download them together as a ZIP.

Sending and sharing

Create lighter copies to attach to emails, chats, and documents.

Frequently asked questions

Compressing images and creating WebP

Are images uploaded to your servers?+

No. Conversion happens directly in the browser on your device. Original images and copies are never sent to our servers.

Does quality get worse?+

It depends on the chosen preset and the source image. Balanced is the recommended starting point; High quality preserves more detail and creates slightly larger files.

Why convert images to WebP?+

WebP is a format designed for the web that often reduces size compared with JPG and PNG while keeping good visual quality. Modern browsers widely support it.

How many images can I optimize at once?+

You can start right away with batches up to 50 images. A free account lets you process up to 100 images per batch; there are no credits or daily quota.

Are original photos modified?+

No. Private Marker creates new optimized copies with -web in the filename. Originals stay on your device.

Start now. Move to 100 when you need it.

Try the tool without registration with batches up to 50 images. If you often work with larger groups, a free account unlocks batches up to 100 images with no credits or subscription.

In development · towards 1.0Tools online

Changelog

Private Marker keeps getting better

We build simple, free and privacy-first tools. Here are the latest improvements to the product.

v0.93
August 2026
- NewNew tool to compress images and convert them to WebP, directly in your browser.
- ImprovedFree batches up to 50 images; a free account raises the limit to 100 images at a time.
v0.92
July 2026
- ImprovedMore precise watermark editor, with logo dragging and easier-to-control adjustments.
- ImprovedImproved the mobile experience, from logo cropping to downloading images.
v0.91
July 2026
- NewEXIF and XMP metadata removal without sending photos to a server.
- ImprovedHEIC support with an export format choice for easier sharing.
v0.90
June 2026
- PrivacyGoogle sign-in: Private Marker does not ask for or manage a new password.

Lighter images. Ready for the web.