Can I reduce a PDF to a specific target size like 1MB?

You cannot set an exact target, but choosing the Max profile applies the strongest compression to get as close as possible to a small size such as 1MB. For scanned documents, the MRC profile usually achieves the largest reduction.

Will compressing a PDF reduce its quality?

The Web and Print profiles preserve readable quality while trimming size. The Max profile may noticeably reduce image quality in exchange for the smallest file, so pick the profile that matches your priority.

Compress PDF File Online Free - Secure PDF Compressor

Compress PDF files online to reduce file size while keeping quality. Free, private, browser-based PDF optimizer with no upload and instant download.

Compress a PDF online to shrink its file size while keeping text and images readable. Drop in your document, pick an optimization profile (Web, Print, Archive, MRC, or Max), and the tool down-samples images, subsets fonts, and strips redundant objects to produce a smaller, ready-to-download PDF. Everything runs in your browser with WebAssembly, so files never upload to a server.

Select PDF filesor drag and drop PDF files here

Options

Setting these options is optional. The default values are a good start for most cases.

Profile

Optimization profile for specific target needs.

Flatten Signatures

YesNo

Flatten visible signatures into non-editable graphics.

Colorspace

Convert color space of raster images.

PDF OPTIMIZING PROFILES

You can select one of the following profile, depending on your needs:

webOptimization for the web (Default profile)

Remove redundant and unnecessary data for the web
Down-sample, clip, and intelligently compress images
Merge and subset fonts
Convert colors to RGB

archiveOptimization for archiving purposes

Remove redundant and unnecessary data for archiving
Intelligently compress images
Merge and subset fonts

printOptimization for print

Remove redundant and unnecessary data for printing
Down-sample, clip, and intelligently compress images
Merge and subset fonts
Convert colors to CMYK

mrcOptimization for scanned images

Profile optimized for PDFs that mainly consist of raster images
Compress the images without significantly reducing the visual quality

maxOptimization for maximal size reduction

Use the maximal possible compression
Might reduce the visual quality

How to Compress PDF Online

Click 'Select File' to upload your PDF document.

Choose an optimization profile (Web, Print, Archive, etc.).

Adjust settings like 'Flatten Signatures' if needed.

Click 'Compress PDF' and download the optimized file.

Key Features

Multiple Optimization Profiles

Choose from Web, Print, Archive, MRC, or Max profiles for tailored results.

Secure Client-Side Processing

Your files are processed locally in your browser and never uploaded to a server.

Structure Optimization

Removes unused objects and optimizes internal PDF structure for smaller file sizes.

FAQ

Can I compress a PDF file online without uploading it?

Yes. This PDF compressor runs fully in your browser with WebAssembly, so your files stay on your device.

How much can this tool reduce PDF file size?

File size reduction depends on content and profile. Scanned PDFs often shrink the most with the MRC profile, while text-heavy files usually keep high quality with smaller gains.

Is this PDF compressor free and watermark-free?

Yes. It is free to use with no hidden fees and no watermarks added to your output PDF.

Does this online PDF compressor work on phone and desktop?

Yes. Because it runs in the browser, it works on Windows, macOS, Linux, Android, and iOS.

How to Compress a PDF Online

1
Add your PDF files
Click "Select PDF files" or drag and drop one or more documents into the upload area.
2
Choose an optimization profile
Pick Web for general sharing, Print for high-quality output, Archive for long-term storage, MRC for scanned pages, or Max for the smallest possible size.
3
Adjust optional settings
Fine-tune options such as colorspace conversion or flattening signatures—defaults work well for most documents.
4
Compress and download
Click "Compress All", then download each optimized PDF or use "Download All" to grab everything at once.

References

ISO 32000-2 — PDF 2.0
The ISO standard defining the PDF 2.0 file format, including object structure and compression streams that PDF optimizers operate on.
MDN — PDF
Mozilla's reference explaining what the Portable Document Format is and how it stores text, fonts, and images.

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JPG Converter

Convert images to and from JPG to prepare them for documents.

Frequently Asked Questions

Can I compress a PDF file online without uploading it?: Yes. This PDF compressor runs fully in your browser with WebAssembly, so your files stay on your device.
How much can this tool reduce PDF file size?: File size reduction depends on content and profile. Scanned PDFs often shrink the most with the MRC profile, while text-heavy files usually keep high quality with smaller gains.
Is this PDF compressor free and watermark-free?: Yes. It is free to use with no hidden fees and no watermarks added to your output PDF.
Does this online PDF compressor work on phone and desktop?: Yes. Because it runs in the browser, it works on Windows, macOS, Linux, Android, and iOS.
Can I reduce a PDF to a specific target size like 1MB?: You cannot set an exact target, but choosing the Max profile applies the strongest compression to get as close as possible to a small size such as 1MB. For scanned documents, the MRC profile usually achieves the largest reduction.
Will compressing a PDF reduce its quality?: The Web and Print profiles preserve readable quality while trimming size. The Max profile may noticeably reduce image quality in exchange for the smallest file, so pick the profile that matches your priority.