Compress and optimize images in your browser
Kompresio compresses, converts, resizes, and cleans JPG, PNG, WebP, AVIF, and HEIC files directly on your device. Free, private, and fast — your photos never leave your browser.
- Runs in your browser
- Batch up to 50 files
- No sign-up
Example output
JPG → WebPmarketplace-product.jpg
2.4 MB → 312 KB
blog-cover.png
1.8 MB → 420 KB
hero-image.webp
980 KB → 284 KB
Illustrative figures. Your results depend on the source image and the settings you choose.
16
Free tools, no sign-up
20 MB
Max file size per image
50
Files per batch queue
100%
Processed in your browser
Popular tools
One workflow for image optimization
Start with the common tools, then move into batch, privacy, and developer workflows when you need them.
Preview first
See what changed before you download
Upload, tune quality, compare the visible result, then export one file or a ZIP. The comparison happens in your browser.
- Original
- 2.4 MB
- Optimized WebP
- 312 KB
- Saved
- 87%
- Processing
- 420ms
Original JPG
4000×2667 · 2.4 MB
Optimized WebP
1920×1280 · 312 KB
Workflow
Three steps, no server upload
Kompresio is built for repeat work: add files, tune, and export — nothing else in the way.
- 01
Upload
Drag in one image or a batch of up to 50 files.
- 02
Adjust
Keep the Balanced default, or set quality, format, and size.
- 03
Download
Export a single file or everything as a ZIP archive.
Formats
Built for modern image pipelines
Convert to WebP, resize assets, clean metadata, and export batches prepared for fast-loading sites.
| Format | Alpha | Motion | Support | Best for |
|---|---|---|---|---|
| JPEG.jpg | 100% | Photos, web images | ||
| PNG.png | 100% | Screenshots, UI, logos | ||
| WebP.webp | 97% | Websites, performance | ||
| AVIF.avif | 93% | Modern web, Core Web Vitals | ||
| GIF.gif | 100% | Simple animations | ||
| SVG.svg | 100% | Icons, illustrations |
Why Kompresio
A working utility, not just an upload box
Tool-first, private, and shaped for the everyday jobs people actually bring to an image tool.
Private by default
Images never leave your device. No upload, no account, no tracking of file content.
No sign-up needed
Open a tool, add files, download results. Works on mobile and desktop.
Batch and ZIP ready
Process up to 50 images at once and export everything as a single ZIP.
Used for
In practice
Used by designers, developers, and sellers
Different jobs, the same short loop: add files, tune, and export.
“I process about 200 product photos a week for my marketplace listings. Kompresio saves me the subscription cost of dedicated photo tools while keeping my images clean and under 200 KB.”
Rina Amelia
Marketplace seller, Tokopedia
“The batch WebP converter with ZIP export is the feature I use most. Drag in a folder of JPGs, set quality to 80, and get a ZIP of WebP files ready for production.”
Dimas Prayoga
Frontend developer
“I was surprised to see GPS coordinates and camera model info in my vacation photos. The metadata scanner caught them before I shared the album online.”
Sari Fitriani
Graphic designer
“Built a Next.js landing page and needed optimized hero images. Resized to 1920px, converted to WebP, and the page hit 98 Lighthouse Performance. No server upload needed.”
Bagus Wirawan
Web developer
Frequently asked questions about Kompresio
Find answers about how Kompresio works, its privacy model, supported formats, and client-side performance.
What is Kompresio and how does it work?
Kompresio is a privacy-first, browser-based image optimization and format conversion suite. Powered by WebAssembly and HTML5 Canvas APIs, it processes your images entirely inside your local device memory. Compression, conversion, and resizing happen instantly without ever uploading your files to any remote server.
Is Kompresio free to use? Are there limits or watermarks?
Yes, Kompresio is completely free to use. There are no watermarks, no account registration required, and no subscription fees. You can compress individual images or batch-process up to 50 files at once and export them as a single convenient ZIP file.
Are my photos private and secure on Kompresio?
Yes. Absolute privacy is the foundational pillar of Kompresio. Unlike traditional converters that upload your personal or client photos to third-party cloud servers, Kompresio performs 100% of processing locally on your computer or phone. Your files never touch a remote network or storage system.
What image formats does Kompresio support?
Kompresio supports all major web and camera image formats, including JPG, JPEG, PNG, WebP, AVIF, HEIC, GIF, and SVG. You can compress files, convert between formats (such as JPG to WebP or PNG to AVIF), resize dimensions, and strip EXIF camera metadata.
Can I use Kompresio on mobile phones (Android & iPhone)?
Yes! Kompresio is designed from the ground up to be ultra-fast and lightweight on mobile devices. It works smoothly in Safari on iOS, Chrome on Android, and all modern mobile web browsers.
Do I need to create an account to use the tools?
No account is required. Every tool works without login, and there is no usage cap beyond the practical file limits: 20 MB per image and up to 50 files per batch queue.
Learn
Guides for image optimization
Start optimizing images in about thirty seconds
No account, no upload, no waiting. Add a file and see the result in the same tab.
- Free to use
- No sign-up
- Files stay on your device