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PDF Compressor

Reduce PDF file size locally before email, forms, or sharing

Browser-local processing The primary workflow runs in this browser tab.

No upload required Use supported files without sending them to a server.

Free workflow path Continue with related tools before any optional commercial links.

Need batch or pro workflows?

Tell us which workflow would save the most time. We use this signal before building any paid feature.

Request a pro workflow

Next workflow steps

Keep working

PDF MergerCombine multiple PDF files into one browser-local document Images to PDFConvert JPG, PNG, and WebP images into a single PDF locally PDF SignPlace a signature image or text mark onto a PDF PDF ProtectAdd password protection to a PDF locally

Short answer

Use FreeTools PDF Compressor to reduce a PDF file size in your browser, which is useful for email limits, form uploads, and document submission portals.

Read the PDF Compressor guide

Best for

People use PDF Compressor when they need to reduce pdf file size locally before email, forms, or sharing without installing desktop software, creating an account, or moving a quick pdf task into a heavy workflow.

Finishing a one-off pdf compressor task before email, upload, publishing, or sharing.
Checking results in the browser before saving the final file or copied output.
Working with personal, school, office, or creator files in a simple local workflow.

Input and output

Inputs: PDF files, PDF page ranges, document passwords when required

Outputs: processed PDF downloads, ZIP files when multiple outputs are generated

Privacy notes

FreeTools is designed around browser-local processing for supported workflows.
Avoid adding sensitive files to any online workflow unless you have checked the page behavior and output carefully.
Keep a backup of the original file before exporting a changed copy.

Common mistakes

Closing the tab before the tool has finished processing or before the download starts.
Sharing the output without opening it once to confirm the result matches the intended task.

Limitations

Very large files can be slower or fail if the browser runs out of memory.
Browser support, file structure, fonts, encryption, or media codecs can affect the final result.

How to use

Open pdf-compressor
Configure options
Download or copy the result

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