Compress PDF to Under 100 MB
or drop files here
100 MB is the limit on many cloud drives, ticketing systems and transfer services. Files that large are almost always scanned archives or image-heavy books, and they are exactly the kind that compress best.
Can every PDF reach 100 MB?
A file in this range is dominated by images stored far larger than they are displayed, so the reduction is usually dramatic and the lightest setting is normally enough. Processing takes longer simply because there is more to do, and you can cancel at any point.
Cloud storage limits
Several services reject single files above 100 MB on free plans.
Scanned books and archives
Hundreds of scanned pages add up quickly, and downsample very well.
Design and print exports
Print-ready exports carry image data far beyond what screen viewing needs.
Smaller, without flattening your text.
Most compressors reach a size target by turning every page into a picture. That works, and it destroys the document: the text stops being text, so it can no longer be searched, copied, read aloud or parsed by an applicant tracking system.
Measure the real size
Each image is checked against the size it is actually drawn at on the page. A photo placed two inches wide needs a fraction of the pixels it is usually stored with.
Try several encodings
Every image is encoded more than one way, and the smallest result that still looks right is kept. Flat diagrams and photographs need different codecs, so neither is forced into the wrong one.
Stop at the first fit
Settings get progressively stronger until the file is under 100 MB, then it stops. You keep as much quality as the limit allows rather than always getting the harshest setting.
Need a different size?
Pick the limit you actually have to meet, or set any figure you like on the main compressor.
Questions answered.
Can my browser handle a file this large?
How long will a file this big take?
How does it hit an exact size?
Will the text still be selectable and searchable?
Is my file uploaded anywhere?
What if the target cannot be reached?
More tools you might need.
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