Compress PDF without losing quality.
Three smart levels, optimized per PDF type. Never outputs a file larger than the original.
Compress PDF Online — Reduce File Size Without Quality Loss
Compress PDF files online for free with Breklo. Our advanced PDF compressor reduces document size by up to 90% while preserving readability and visual quality. Whether you need to email a large PDF, upload a document to a job application portal, or save storage space, our free online PDF compression tool handles it in seconds — directly in your browser, with no uploads to external servers.
Why compress PDF files?
PDF files often exceed email attachment limits, especially when they contain scanned pages, high-resolution images, or embedded fonts. A typical 50-page PDF can range from 5 MB to 50 MB depending on its content. Most email providers cap attachments at 25 MB (Gmail) or 20 MB (Outlook), and many web forms reject files larger than 5 MB. Our free PDF compressor solves this problem instantly. By intelligently re-rendering pages and optimizing internal structure, Breklo reduces your file size dramatically without making the PDF unreadable.
How our PDF compressor works
Breklo offers three compression levels: Light, Medium, and High. Light mode performs lossless structural optimization — perfect for text-heavy documents where you need selectable text. Medium mode re-renders pages at 1.5× resolution with 60% quality, striking the ideal balance between file size and visual fidelity for most use cases. High mode applies aggressive compression at 1× resolution with 35% quality, delivering the smallest possible file size. Our tool automatically analyzes your PDF before compressing, choosing the best strategy for your specific document type.
PDF compression for every situation
Compress PDFs for email attachments, online job applications, university submissions, government forms, or website uploads. Our PDF size reducer handles legal documents, contracts, invoices, scanned books, photo albums, presentations, business reports, and academic papers. Unlike desktop software like Adobe Acrobat Pro or specialized PDF editors, Breklo requires no installation, no subscription, and no signup. Just drag, drop, and download a smaller PDF in seconds.
Free, private, and secure
All PDF compression happens locally in your browser using WebAssembly. Your files never upload to our servers, never get scanned by third parties, and never persist after you close the tab. This makes Breklo the most private PDF compressor available — ideal for compressing confidential business documents, legal contracts, financial statements, medical records, or any sensitive PDF. We charge nothing, store nothing, and track nothing.
Compress PDF on any device
Breklo works on Windows, Mac, Linux, ChromeOS, iPhone, iPad, and Android devices. There is no app to download and no software to install. Open any modern browser (Chrome, Safari, Firefox, Edge), drop your PDF, choose a compression level, and download the result. Our PDF size optimizer is the fastest way to shrink PDF files on mobile devices, where dedicated software is unavailable.
How to use Compress PDF without losing quality.
Three steps. No installation, no account, no watermark.
Drop your PDF
Drag a PDF file in, or click to browse from your device.
Pick a compression level
Light is lossless for text PDFs. Medium and High re-render pages for image-heavy files.
Download
Your compressed PDF downloads instantly. Never larger than the original.