Compress PDF to a Target Size Free Online
Shrink a PDF locally with balanced or extreme presets, or set an exact target size such as 50 KB or 100 KB. See before and after sizes instantly, no uploads.
Frequently asked questions
How do I compress a PDF to under 100 KB?
Pick the exact-size option and type the target, for example 100 KB. The engine downsamples and re-encodes the page images in steps, checks the real output size after each pass, and stops as soon as your file fits.
Which preset should I choose?
Balanced keeps documents readable and is right for essays, forms and reports. Extreme pushes the size down as far as it goes and is meant for strict upload limits, where slightly softer images are an acceptable trade.
Why does my PDF stop shrinking?
Text-heavy files have a floor: embedded fonts, vector art and page structure cannot be discarded without damaging the document, so the tool reports the smallest size it can honestly reach instead of producing an unreadable file. The whole operation runs inside your browser tab; the file is never uploaded, so nothing is stored or logged.