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Compress PDF files online - and merge, split, convert, and more, right in your browser

If you need to compress a PDF that is too big to email, merge a few scanned receipts into one document, or pull text out of a PDF into a Word file you can edit, OnePDF is built to do all of that in a single tab. Every tool here runs on your device using open-source JavaScript libraries, so the PDF you open never has to leave your computer. There is no upload step, no account to create, and no watermark stamped onto your file at the end. You drop a PDF in, the work happens locally, and you download the result.

How to compress a PDF online for free

The PDF compressor is the most-used tool here, and for good reason — most email providers cap attachments at around 25 MB, and a few high-resolution scans can blow past that in seconds. Drop your PDF into the compress PDF tool, pick a quality level, and the file is re-encoded right in your browser. Light compression cleans up the file structure without touching page content, so the text stays selectable and the page looks identical; Recommended re-encodes embedded images at a balanced quality and is the right choice for most everyday documents; Maximum produces the smallest possible file by re-rendering each page as a high-resolution image, which is great when you need to squeeze under a strict size limit but means the text in the output is no longer selectable. There is no queue, no processing wait, and nothing to pay — the compressed PDF is ready to download as soon as the bar fills.

Merge, split, and reorder PDF pages

Need to merge PDF files into a single document? Drop every PDF you want to combine onto the Merge tool, drag the list into the order you want, and OnePDF stitches them into one file while preserving each page's original layout. To split PDF pages, the Split tool lets you do it three ways: pick individual pages out of a longer document, break the whole file into one PDF per page, or carve it up by custom ranges like 1-3, 5, 8-10. When the result is more than one file, the pages are bundled into a single ZIP for a clean download. Both tools keep text selectable and use the same in-browser pipeline, so working with confidential documents — contracts, tax forms, medical paperwork — does not require trusting a third-party server.

Convert PDF to Word and turn images into a PDF

The PDF to Word converter extracts readable text from a text-based PDF and writes it into an editable .docx with optional page breaks and page labels. It is the fastest way to repurpose a PDF report into something you can revise, restyle, or quote from in another document; scanned PDFs without an underlying text layer will need to be run through an OCR tool first. On the other side, the image to PDF tool does the inverse job: drag in a folder of JPGs, PNGs, or screenshots, pick a page size (A4, Letter, or fit-to-image) and a margin, and the tool assembles them into a single tidy PDF — perfect for ID copies, expense receipts, or a photo set you want to send as one file.

Every tool runs entirely in your browser using pdf-lib, PDF.js, JSZip, and docx. There is no server between you and your file. If you are wondering about practical limits or what happens to your documents after you close the tab, the FAQ has the short answers.