How to compress images
- 1
Add your images
Drop in JPG, PNG, WebP or AVIF files — one or many.
- 2
Set quality & format
Keep the original format or switch to WebP/AVIF for smaller files. Optionally cap the size.
- 3
Compress & download
Hit Compress. See exactly how much you saved, then download.
Why compress?
Images are 50–75% of a typical page’s weight. Smaller files mean faster sites, quicker uploads and lighter email attachments — without a visible drop in quality. WebP and AVIF routinely cut size by 30–50% versus an old JPEG. To take full advantage of next-gen formats, try our AVIF Converter.
What is Image Compression?
Image compression reduces the file size of your graphics and photos, making them easier to store and much faster to load on websites. Unlike competitors that upload your files to remote servers, Tools11x processes everything locally in your browser. This means your data is fully secure, and you never have to wait for uploads or downloads.
Questions
How does it keep quality high?
It uses the same codecs as desktop tools — MozJPEG, libwebp and libavif — compiled to WebAssembly. At the default quality, the size drops sharply while the difference stays invisible to the human eye. This means you get professional-grade optimization without needing expensive software. For instance, a 5MB photograph can often be reduced to under 1MB while looking identical on high-resolution displays.
Are my images uploaded anywhere?
No. Everything runs directly in your web browser, safely on your own device. Your images never leave your computer or phone, ensuring complete privacy and security. Unlike competitors that upload your files to remote servers, Tools11x processes everything locally. This also means the compression happens instantly without waiting for slow network uploads.
Which format should I choose?
Keep the original format for maximum compatibility across all devices and software. Choose WebP for the best balance between file size and browser support, which is ideal for websites. Opt for AVIF if you need the absolute smallest files, though older browsers might not support it yet. Meanwhile, PNG stays lossless, making it the perfect choice for graphics, logos, and screenshots with crisp text.
Will it change the image dimensions?
Only if you explicitly ask it to. By default, only the file size shrinks while preserving the original resolution. However, you can optionally cap the longest side of the image, which is the biggest single way to save space. For example, resizing a 4000px camera photo to 1920px before compression can reduce the file size by over 80%.
Is an image compressor safe to use?
Yes — this one is about as safe as it gets, because your images never leave your device. Everything runs locally in your browser using WebAssembly, so there’s no server that could store, leak, or misuse your files. Compare that to compressors that upload your photos to process them remotely, where you’re trusting a third party with your data. With Tools11x, there’s simply nothing to trust because there’s no upload step at all.
Is there a free image compressor?
Yes, Tools11x is completely free to use with no sign-up, no watermark, and no daily limit on how many images you can compress. There’s no premium tier gating basic features like format choice or size targets — everything shown on this page is available immediately. Because processing happens on your own device rather than our servers, there are no hosting costs that would otherwise justify a paywall.
How do I use a photo compressor?
Drop your photo into the tool, choose whether to keep the original format or switch to WebP/AVIF for extra savings, and adjust the quality slider if you want more control. Click Compress and the tool processes the image instantly in your browser — no waiting for an upload or download queue. You can then compare the before/after file size and download the result, or drag in more photos to compress as a batch.
What is an image compressor?
An image compressor is a tool that reduces a photo or graphic’s file size, usually by re-encoding it with a more efficient codec or slightly reducing quality in ways the eye barely notices. It’s different from resizing, which changes the pixel dimensions — compression targets file weight directly. This is useful for meeting upload limits, speeding up websites, or simply saving storage space without needing to shrink the actual image.