Compress PDF

PDF compression reduces the overall file size by adjusting the resolution and quality of images embedded within the document. Each page is rendered and re-encoded as a JPEG image at the quality level you choose, which means the output is optimized for viewing and sharing rather than text editing. This is particularly useful when you hit email attachment limits (typically 10-25MB), need faster upload speeds, or want to save storage space.

User Guide

1. Drag and drop a PDF file or click the upload area to select one
2. Adjust the quality slider -- lower values mean smaller files, higher values preserve more detail
3. Click the "Compress" button and wait while each page is processed
4. Review the compression results (original size, new size, and percentage saved)
5. Click "Download" to save the compressed PDF to your device

Core Features

• Fine-grained quality slider from 10% to 100%
• Real-time display of original size, compressed size, and reduction percentage
• Supports files up to 50MB
• Complete privacy with in-browser processing -- no server uploads
• Instant download after compression completes

When This Comes in Handy

• Shrinking email attachments to stay under service limits
• Meeting file size requirements for government portals or university submissions
• Speeding up PDF loading on websites and blogs
• Saving cloud storage space when archiving documents
• Optimizing large batches of scanned documents for long-term storage

What to Expect from the Compressed File

Under the hood, this tool renders each page and re-encodes it as a JPEG image at the quality you pick on the slider. That approach shrinks scanned documents and image-heavy reports dramatically, but it also means the output behaves like a stack of pictures: text in the compressed copy can no longer be selected, copied, or searched. Keep the original whenever you might need those features later, and treat the compressed version as a lightweight copy for sending and viewing.

Quality settings below 50% also lower the rendering resolution, which is why the size drops so sharply at the left end of the slider. Fine print and dense tables are the first things to suffer, so if your document contains small text, stay at 70% or above and check the result before sharing it. One more tip: compressing an already-compressed file mostly stacks JPEG artifacts without saving much space — if you need a smaller file, go back to the original and pick a lower quality instead of compressing twice.

Typical Workflows

Suppose a job portal rejects your 18MB scanned certificate bundle because uploads are capped at 5MB. Load the file, start at 60% quality, and check the result screen — if the compressed size still misses the cap, click "New File", reload the original, and step the slider down by ten points at a time until the number on the results screen fits. Because the source file on your disk is never altered, this trial-and-error costs nothing.

Another common flow is archiving. Say you have a year of scanned utility bills taking up space in cloud storage. Compress each statement at 50-60%, verify a couple of them are still readable, and replace the bulky originals in your archive folder — for documents you only ever skim on screen, the visual difference is minor while the storage savings add up.

For files above the 50MB upload cap, pair this tool with Split PDF: cut the document into parts, compress each part, then reassemble them with Merge PDF.

Common Questions