PDF Compressor
How Do I Make a PDF Smaller
This is the FastAiZip local PDF compressor. Use it when the job is simple: get the PDF smaller, deal with an email attachment limit, or get under an upload cap without leaving the browser.
No PDF upload
The PDF stays in the browser instead of going through a default upload pipeline.
Best for scanned PDFs
Scanned PDFs, screenshot-heavy PDFs, and image-heavy PDFs usually shrink more.
Built for email and upload
A direct fit when a PDF is too large to email or upload.
PDF Tool
Make a PDF smaller in your browser
Made for the common moments behind how do i make a pdf smaller, pdf file too big to email, and pdf too big to upload. Everything stays local in the browser with no PDF upload.
No Upload
Local Rebuild
If compression does not make the file smaller, the tool keeps the original PDF. Scanned PDFs usually shrink more than text-first PDFs.
PDF queue
0Imported PDFs will appear here before compression starts.
Results
If compression does not make the file smaller, the tool keeps the original PDF. Scanned PDFs usually shrink more than text-first PDFs.
Imported PDFs will appear here before compression starts.
Overview
How to Reduce the Size of a PDF
This is the main FastAiZip page for broad PDF-size intent: people who need the file smaller before they send it, upload it, or save a lighter copy.
FastAiZip rebuilds the PDF locally in the browser, so the first release is best for scanned PDFs, image-heavy PDFs, and screenshot-heavy PDFs. Text-first or vector PDFs can still be tested, but they may not shrink as dramatically as scanned documents.
Use Cases
How to Reduce File Size of PDF Document for Email or Upload
PDF file too big to email
Compress the PDF locally first, then resend the smaller attachment.
PDF too big to upload
Use it when a form, CMS, or internal tool rejects the PDF because the file is too large.
How to compress a PDF on Mac
If you want a fast Mac workflow without installing another PDF app first, this is the cleaner path.
Workflow
How Can I Make a PDF File Smaller in My Browser
Fit
Optimize PDF and Compress PDF Without Losing Quality
If the goal is simply getting a smaller PDF for sending, uploading, or storing, this tool is a strong starting point. It fits scanned PDFs, screenshot-heavy PDFs, and image-heavy documents best because those files usually have more room to shrink.
If the PDF is mostly text, vectors, forms, or precision layout, expect smaller gains. The first release is meant to solve common PDF size jobs, not promise that every PDF will shrink dramatically.
Resources