Compress an image to under 100 KB
Start with a 100 KB target for tight attachment limits. Compare alternatives before accepting a major quality reduction.
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JPEG · PNG · WebP · HEIC · AVIF and more / batch support
Up to 20 photos · 25MB each · 100MB total · 16 megapixels
Photos are automatically backed up in your work storage for 24 hours by default. You can change this in Settings.
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Check detail when the limit is small
100 KB is a tight limit for a profile picture or a small attachment. Fitting a high-resolution photograph into it can remove useful detail. First check the dimensions the destination actually needs. For a picture displayed at a small size, resizing first may produce a clearer result than keeping all the pixels and lowering quality aggressively.
Add a photo to search for a result under 100 KB. Zoom into faces and lettering. If the quality floor is reached, choose a smaller-dimension alternative or another format accepted by the recipient.
- Check the required file format, pixel dimensions, and maximum size separately.
- Crop unnecessary surroundings and prepare the required dimensions.
- Compare faces or text in the 100 KB result before saving.
Why does an upload form still say the file is too large?
This tool counts 1 KB as 1,024 bytes. If the form means 100,000 bytes, try a target of about 97 KB. Also make sure you selected the newly saved copy.
Can a large group photo stay sharp at 100 KB?
Not every photo can meet this limit at its original dimensions and sharpness. Many faces or intricate detail may become blurred. Compare the offered resize options before choosing one.
Is 100 KB suitable for a scanned document?
Use that limit when the recipient requires it, rather than as a general rule. Dense text, stamps, or small numbers can become unreadable in a very small file. Zoom in to check them. If they are unclear, ask whether the recipient accepts a PDF or a larger file instead.
How should I choose a smaller-dimensions alternative?
Compare it with the size at which the photo will actually be seen. A small profile picture may look better with fewer pixels and cleaner edges. A photo intended for printing needs enough pixels for the print size. Check both dimensions and color changes in the alternative preview, and keep the original if none is suitable.
Should I compress the compressed copy again?
That can accumulate damage. Start again from the original when trying another target. A filename that includes the purpose, such as profile-100kb, helps distinguish copies. When uploading, check that you selected the newly saved file from Downloads rather than the larger original.