Compress PDF to 100KB
Iteratively downsamples graphics stream arrays client-side to target exactly your size threshold.
Workspace Preview Standby
Select a document file card in your queue list to inspect its specific page outlines and downsampled metrics.
How Compress to Specific Size Works
Our high-performance online utility runs entirely client-side, processing your files securely and instantly inside your web browser. For related functions, you can also use our Compress to 1MB and Compress PDF utilities.
Choose Target Size
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Upload PDF
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Iterative Compression
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Custom Size Options
Designed for professional results, privacy, and maximum compatibility across all modern desktop and mobile browsers:
100KB Target
Full digital precision and optimized performance with zero server-side latency or external data transfers.
500KB Target
Full digital precision and optimized performance with zero server-side latency or external data transfers.
1MB Target
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Download Result
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Frequently Asked Questions About Custom PDF Size
Is this custom size compressor free?
Yes. Compress unlimited PDFs to any specific size with no registration.
Which target sizes are supported?
100KB, 200KB, 500KB, 1MB, 2MB, and custom sizes upon request.
How does iterative compression work?
Repeatedly compresses images until the target file size is achieved.
Do you store PDFs here?
No. All compression happens locally with complete privacy.