Unlimited access to all our tools
How does it work?
Upload & compress PDFs easily
- 1
Click the “Upload to compress” button or move your PDF to the “Move here” area.
- 2
Our PDF compressor quickly reduces the size of PDF files.
- 3
The compressed PDFs will automatically be saved in your Documents folder and your account.
How to Compress a PDF
PDFAid is a fast, online PDF compressor built for everyday document needs. It lets you reduce file size directly in your browser. And it’s accessible to everyone — on any device and at any time.
You can get started right away. Simply upload your document and adjust the settings to get a compressed file. Once compression is complete, you can download your files. You’ll get an email notification from PDFAid with a direct Download button. You can also find all compressed files in the Documents folder in your account.
How does it work step by step? With our tool, it only takes 3 steps to compress a PDF online:
Upload the document you need to compress or drag the file directly into the box from your device.
Choose a compression level for your desired balance of size and quality.
Download the compressed file.
Reduce PDF File Size
There are many situations when you need to reduce PDF size:
When you need to send documents via email and meet size limitations
When you need to upload files to a website that has size limits
When you need to save your documents without using too much storage space
Our tool handles each of these situations. It automatically detects images inside documents, which are the primary source of its size, and optimizes them without compromising quality.
PDF Size Reducer — Compression Settings
When uploading a file into our PDF size reducer, you can adjust the compression settings. You have 3 options that determine the percentage of compression and give you full control over the balance of the file size and quality.
Level | Extreme |
|---|---|
Compression | ~40% smaller |
Quality | Lower quality |
Best for | Maximum size reduction |
Level | Standard |
|---|---|
Compression | ~20% smaller |
Quality | Balanced |
Best for | Most use cases |
Level | Low |
|---|---|
Compression | ~10% smaller |
Quality | Best quality |
Best for | Preserving quality |
Compress PDF Without Losing Quality
When you compress a PDF file with our tool, the text and fonts inside it remain unchanged, regardless of which option you choose — Extreme, Standard, or Low. Our tool only optimizes images in your file to reduce the size. Yet, the image quality remains high even after compression. This way, you can rely on our tool for compressing document scans, presentations, resumes, forms, and any other documents that must retain quality and readability.
Online PDF Compressor That Works on Any Device
Our online PDF compressor works directly in the browser. It is available on any device and operating system, including Windows, Mac, iOS, and Android. There is no need to download any special software. Just upload your file and reduce its size instantly. Compressed files are automatically downloaded to your device and saved in the Documents folder in your account.