A faster website
Lighter photos load sooner on phones and improve your visitors’ experience.
Image optimizer
Make your photos lighter.
What it does Heavy photos slow your website down and get rejected by forms and portals. Reduce their size at the quality you choose, compare before and after, and see how much you saved.
InputHeavy photo →OutputLight photo
- Your files never leave your device
- Free
- No account
That easy: 3 steps
Follow the colours: blue shows where to start and green shows where your result is.
- Step 1: Add your imagesDrag up to 5 JPG, PNG or WebP files onto the blue area or press «Choose photos».
- Step 2: Choose the use«Balanced web», «Photography» or «Social media». If you need an exact size, type it in «Target size».
- Step 3: Optimize and comparePress «Optimize images», check the real savings and download each photo or the ZIP.
- Start here
- Customize
- Result and download
- Check carefully
Your images, ready to improve
Add your files, then choose how you will use them.
Your photos start here
JPG, PNG or WebP · up to 5 files · 20 MiB per image · 50 MiB per batch
Selected images 0
Your images and their dimensions will appear here.
No file uploads. Keep your originals.
Choose your images to get started.
Your results
Compare each image before downloading. Your originals stay intact.
- Images ready
- 0
- Original size
- —
- Final size
- —
- Total saved
- —
Day to day, it helps you…
Meet size limits
Government sites, portals and marketplaces asking for «max 500 KB» or «max 2 MB».
Save data and space
Send catalogues and product photos without eating your customers’ data.
For a better result
- «Balanced web» is the best starting point.
- Check each photo’s real savings before downloading.
- If a photo doesn’t improve, you can keep the original.
Keep in mind
A very low target size reduces quality or dimensions: check the preview before downloading.
Why use it here instead of another site
Why use it here instead of another siteOn lumHUBOn many sites
Cost
Free, no pay-to-downloadPaid plans or pay per download
Your files
Processed in your browserUploaded to their servers
Sign-up
Not neededEmail or account usually required
Watermark
NeverCommon on free versions
How to optimize your images
- Choose up to five static JPG, PNG or WebP images.
- Choose a preset or adjust format, quality, dimensions and target size.
- Optimize, compare actual savings, and download individual files or a ZIP.
Local processing
Images and comparisons stay on your device. Clearing the list or leaving releases results in memory; saved downloads remain under your control.
Things to know
20 MiB per image, 50 MiB per batch, 16 million pixels and 8192 px per side. SVG, GIF, HEIC, AVIF and animations are not supported. JPG replaces transparency with white; PNG and WebP retain it. Recompression can lose quality or increase file size. Re-encoded files do not retain all metadata; retained originals do. Target size may not be reached.
JavaScript and a browser supporting local image processing are required.
FAQ
Frequently asked questions
How does target size work?
It tries several quality levels and, if enabled, resizes without going below your minimums. It returns the best measured result and reports whether the target was reached.
Is PNG always compressed losslessly?
PNG re-encoding does not use the lossy quality control. Resizing changes pixels. A smaller file is not guaranteed.
What if the original is smaller?
With Keep original enabled, it is retained when format and dimensions stay the same and the new version is not smaller. Its metadata also remains.
Can I optimise more images afterwards?
Yes. You can repeat the optimisation without hourly or IP-based usage quotas. File and batch size limits protect your device memory.