Smaller images. Quality you control.
Compress, resize and convert images with quality settings you control. Private browser-based processing keeps your files on your device.
Image optimization that stays on your device
Choose one image or a batch, control the format, dimensions and compression quality, then inspect the result before saving it. The image workflow runs inside your browser: OptimizePixels does not send your source files or processed results to an image-processing server.
What you can do
Compress images while choosing the quality level yourself.
Convert images to WebP, AVIF, JPEG or PNG.
Resize oversized images before publishing them.
Compare the original and optimized versions before saving.
Process batches without creating an account.
How OptimizePixels works
Choose images from your device
Select files with the browser picker or drag them into the workspace. You can start with one image and add more whenever you need to.
Choose the output
Select an output format, quality level and dimensions. Presets provide a useful starting point, while the individual controls let you adapt the result to the image and where it will be used.
Review and save
Check the file-size difference and compare the visual result. Save images individually or save a processed batch to your device as one ZIP file.
No image-processing upload
Decoding, resizing, conversion, previewing and result preparation happen in this browser. Your working project may be stored as site data on this device so it can be restored, but it is not cloud storage or a permanent backup. Clearing OptimizePixels site data can remove it. See exactly where images are processed and stored .
Choose an output format
WebP
A practical modern default for photos, graphics and transparent images when you want a strong balance of size, quality and compatibility.
AVIF
Worth testing for large photographs and hero images when reducing file weight is a priority and modern browser support suits your audience.
JPEG
A familiar, widely supported choice for photographs when transparency is unnecessary or a traditional fallback is required.
PNG
Useful for screenshots, interface graphics, transparency and sharp-edged artwork where lossless detail matters more than the smallest file.
A workflow for different kinds of images
Photographs
Resize to the largest dimensions actually needed, then compare WebP and AVIF at a moderate quality setting. Keep the source file separately for future editing.
Screenshots and interface images
Check text, thin lines and hard edges carefully. PNG may preserve them most predictably, while WebP can be useful when its smaller output still looks clean.
Hero and banner images
Use the real display dimensions as your guide, review the crop at mobile and desktop sizes, and avoid trading a prominent visual for an unnecessarily aggressive quality setting.
Image batches
Apply one sensible starting preset, inspect representative files and adjust images that contain faces, gradients, text or unusually fine detail before saving the batch.
Quality settings change both appearance and file size
Quality 100. 2.4 MB. JPEG. 100. Portrait image exported as JPEG quality 100 with high detail
Quality 50. 168 KB. JPEG. 50. Same portrait exported at JPEG quality 50 with slight compression artifacts
Quality 5. 20 KB. JPEG. 5. Same portrait exported at JPEG quality 5 with heavy blocky compression artifacts
One JPEG exported at three quality levels. The useful setting depends on the image, its displayed size and how closely visitors are likely to inspect it.
Frequently asked questions
Do my images leave this device for processing?
No. The image workflow runs locally in your browser. A working project can be stored as browser site data on this device, but the selected files and processed results are not sent to an OptimizePixels image-processing server.
Which image format should I choose?
WebP is a useful modern default for many websites. Test AVIF when maximum compression matters, JPEG when traditional compatibility is required, and PNG for transparency, screenshots or graphics that need lossless detail.
What quality setting should I use?
There is no universal setting. A range around 75 to 85 is often a sensible starting point for photographic WebP or JPEG output, but you should compare the actual image at its intended display size before publishing it.
Should I resize an image before compressing it?
Usually, if its pixel dimensions are much larger than the largest size at which it will be displayed. Reducing unnecessary dimensions can save more data than compression alone.
Should I keep my original images?
Yes. Keep original source files separately when you may need to edit, crop or export them again. Optimized website images are delivery copies rather than ideal archive masters.
Can I optimize several images together?
Yes. Add multiple images, apply shared output settings and save the processed files together. Review a representative selection because different images can respond differently to the same quality setting.