Compress an image down to an exact file size
Under 200 KB for the application. Under 1 MB for the upload. Give the tool the number and it finds the quality and dimensions that land under it, rather than making you guess and re-try.
- Target
- Any size in KB or MB, per image
- Reads
- JPG, PNG, WEBP, and HEIC from an iPhone
- Monthly limit
- None. Nothing is metered because nothing is uploaded
- Batch
- Any number of images at once, zipped
How to use it
- Drop the images in. HEIC from an iPhone is accepted directly.
- Type the size limit you have been given.
- Choose whether it may also reduce the pixel dimensions, which is how it hits very small targets.
- Compress, then check the before and after figures next to each file.
Questions
Why do the free services cap me at a few hundred images a month?
Because their compression runs on their servers, which cost them money per image. This runs on your processor, which costs them nothing, so there is no reason to count.
How does it reach a very small target?
First it lowers JPEG quality in a binary search. If the target is still out of reach, and you allowed it, it scales the pixel dimensions down and searches again. A 4000 pixel wide photo cannot become 50 KB while staying 4000 pixels wide.
Will it strip my EXIF data?
Yes. Re-encoding drops the metadata, which includes the GPS coordinates of where the photo was taken. For anything you are about to post publicly that is a quiet privacy win.
Does it handle PNG screenshots?
It does, and for a screenshot with text you will usually get a much smaller file by letting it write JPG or WEBP instead of PNG. The output format control is in the panel.
Next door
heic to jpg, compress pdf to a size, remove background, passport photo.