PDF tools
Merge, split, compress, rotate, number, watermark and convert PDFs — all of it inside your browser, so the document never leaves your device.
29 free tools · no sign-up · nothing uploaded
Combine several PDFs into one, in the order you choose.
Break one PDF into separate files by page count or range.
Make a PDF smaller, with an honest choice about the trade-off.
Turn every page of a PDF into a JPG image.
Export PDF pages as lossless PNG images.
Turn JPG photos into a single PDF document.
Combine PNG images into one PDF document.
Any mix of image formats into one PDF.
Keep only the pages you want as a new PDF.
Remove pages from a PDF and keep the rest.
Put a PDF's pages into a different order.
Turn pages the right way up, permanently.
Stamp text like DRAFT or CONFIDENTIAL across every page.
Number the pages of a PDF, your way.
Pull the plain text out of a PDF.
Turn a PDF into an editable .docx document.
Convert a .docx document into a PDF.
Read the text out of a scanned PDF.
Turn an HTML file or snippet into a PDF.
Turn Markdown into a formatted PDF.
Turn a plain text file into a tidy PDF.
See every page and drag, rotate or delete it.
Permanently remove sensitive text, not just cover it.
Draw your signature and place it on the page.
Trim margins or scan borders from every page.
Spot every wording change between two PDFs.
Turn a PDF into Markdown for notes, docs and LLMs.
Recover tables from a PDF into a spreadsheet.
Turn a spreadsheet into a readable PDF.
Why in-browser PDF tools matter
PDFs are the format people use for the documents they care about most: contracts, payslips, medical letters, passports, tax returns. Almost every free PDF site online asks you to upload those documents to a server you know nothing about, then trusts you to believe a promise that the file was deleted afterwards.
DO101 takes the promise out of it. Every tool on this page uses pdf-lib and pdf.js running inside the page you are reading. There is no upload endpoint behind any of them, so your document physically cannot reach a server. Switch off your network after the page loads and most of them still work.
What each tool is for
Combining and separating: Merge PDF joins several files into one in the order you set. Split PDF breaks one file into many. Extract pages keeps a selection, Delete pages drops one, and Reorder pages shuffles them.
Fixing and finishing: Rotate PDF saves the rotation into the file so it sticks. Page numbers and watermarks stamp every page. Compress PDF makes files smaller, and it is honest about the trade-off in each mode.
Converting: Turn pages into JPG or PNG, build a PDF from photos or any images, pull out plain text, produce an editable Word document, go the other way with Word to PDF, or read a scan with PDF OCR.
What browser-based PDF tools cannot do
Being straight about the limits is part of the point. A browser cannot decrypt a password-protected PDF, so PDF unlocking is not offered — a tool that pretended otherwise would just fail on your file. Adding encryption is likewise not supported by the libraries that can run here.
PDF to Word converts text, not layout. Rebuilding columns and tables needs heavy layout analysis that realistically belongs on a server. DO101 does the part it can do well and tells you plainly what it leaves out, instead of handing back a mangled document and calling it a conversion.
Compression has real limits too. Re-encoding the individual images inside a PDF while leaving the text alone requires a full object rewriter. DO101 offers the two strategies it can genuinely deliver and explains what each one costs you.
Frequently asked questions
Are my PDFs uploaded to a server?
No. Every tool in this category runs in your browser using pdf-lib and pdf.js. DO101 operates no upload endpoint for PDFs, so the file cannot leave your device even by accident.
Is there a file size limit?
100 MB per file. The real constraint is your device's memory: a laptop handles large documents comfortably, an older phone will struggle above about 25 MB, and the tools warn you when a file is big enough to be slow.
Do the tools add a watermark?
Never. DO101 does not brand your documents. The only watermark that appears is the one you deliberately add with the watermark tool.
Can I use these tools offline?
Mostly yes. Once a tool page has loaded, its code is cached, so merging, splitting and rotating keep working without a connection. PDF OCR is the exception — it downloads a language model the first time you use it.
Why can't I open my password-protected PDF?
Encrypted PDFs cannot be decrypted by the browser libraries DO101 uses. Open the file in the application that created it, remove the password, then use the tool.