How much smaller will my image be?
It depends on the image format, dimensions and quality setting. Photos often shrink more than screenshots with sharp text. Images that are already compressed may not get much smaller.
Compress Image
Reduce image file sizes in batches while keeping visual quality close to the original
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Make Your Images Smaller
Photos straight off a phone or camera are usually far heavier than a form, website or email will tolerate. Compress Image shrinks JPG, PNG and WebP files by re-encoding them at a quality level you control, keeping the picture presentable while the byte count drops.
Compression Settings
Reduce image file size by adjusting quality and optimizing the encoding. The default quality setting works well for most images, but you can move the slider to find the right balance between smaller files and visual quality.
Batch Compression
Mixed batches are fine here: JPG, PNG and WebP files can go in together, up to 30 images and 50MB per run. Compress one image and you get that image straight back. Compress several and the results land in a ZIP, along with a report comparing original and final sizes.
What Gets Optimized
Compression uses optimized encoders for JPG, PNG and WebP images. JPG files can have unnecessary metadata removed. PNG files can be compressed while keeping sharp graphics clear. WebP files are re-encoded with practical settings for smaller output.
Common Use Cases
Websites, email attachments, galleries and social uploads are where compression pays off. Smaller images are easier to send, store and publish without slowing down pages or hitting upload limits.
How to Compress Image
1
Upload your image
Select the image file you want to compress.
2
Adjust quality
Use the quality slider to set the compression level. Lower values produce smaller files.
3
Compress and download
Click Compress and download the optimized image.
Frequently Asked Questions
Will image compression reduce quality?
It can, especially with JPG and WebP at lower quality settings. Note that AVIF uploads are saved as JPG by this tool, so they go through the same lossy step. Use a higher quality setting when text, faces or product detail matter, and open the result before publishing it.
Can I target a specific file size?
Yes. Enter a target size in KB when a website or form has a strict upload limit. PDFem will try to get close to that size by adjusting compression. Very small targets can make an image look soft, so check the output carefully.
Which image formats can I compress?
PDFem supports common image formats such as JPG, PNG, WebP and other formats available in the tool. The exact accepted formats are shown on the upload area.
Should I use JPG, PNG or WebP after compression?
Use JPG for ordinary photos, PNG for graphics or screenshots where crisp edges matter and WebP for smaller web images when the destination supports it. The best choice depends on where the image will be used.
Can I compress multiple images at once?
Batch compression is the normal way to use this tool. Stay within the upload limits and every image in the run is processed; the results come back in a ZIP together with a report listing the original and final size of each file.
Why does a screenshot behave differently from a photo?
Screenshots often contain sharp text, flat colors and interface edges. Photos contain gradual color changes. A compression setting that looks fine for photos can make screenshot text look blurry.