Every PDF and research job, done in seconds.

Merge, compress and sign PDFs, cite sources, find papers and journals, all free. Your files are processed on your own device.

PDF tools

Compress

Compress PDFMake a PDF smaller for email and uploads.Compress imageShrink JPG and PNG files, or fit them under 50 KB.

Organise pages

Merge PDFCombine several PDFs into one file.Split PDFSeparate pages or ranges into new PDFs.Rearrange PDFDrag pages into a new order.Rotate PDFTurn pages that are sideways or upside down.Delete PDF pagesRemove the pages you don't need.Extract PDF pagesSave selected pages as a new PDF.

Convert

JPG to PDFTurn photos and images into a PDF.PDF to JPGSave each page as a JPG image.OCR PDFMake scanned PDFs searchable, in Hindi or English.

Edit and sign

Sign PDFDraw, type or upload your signature.Watermark PDFStamp text across your pages.Add page numbersNumber the pages of a PDF.

Research tools

Cite and reference

Citation generatorAPA, MLA, Harvard and more, from a DOI or title.APA citation generatorReferences and in-text citations in APA 7th edition.MLA citation generatorWorks Cited entries in MLA 9th edition.Reference converterTurn BibTeX or RIS into formatted references.

Find research

Paper finderSearch millions of real research papers.Journal finderFind journals to read or publish in.

Writing helpers

Similarity checkerCompare two texts and highlight shared passages.Word counterCount words and check readability.Text summarizerPull out the key sentences of a long text.Text cleanerFix line breaks and spaces in text copied from PDFs.

Study

Notes makerNotes from a PDF, Word file, photo or text, in Hindi or English.Flashcard makerMake flashcards, then study or take a quiz.

Files stay on your device

The tools run inside your browser. Documents are never sent to a server, so there's nothing to delete afterwards.

Real sources, not guesses

Citations and paper searches come from Crossref, OpenAlex and other official databases, so every reference can be traced.

Free, no account needed

Use any tool as often as you like, on a phone or a computer. We don't add our name to your files.

Questions

Is LMPure free?

Yes. Every tool on this page is free to use, with no sign-up and no watermark added to your files.

Are my files safe?

The PDF tools run entirely in your browser, so your files are processed on your own device and never uploaded. Research tools that search databases send only your search words.

Are the citations accurate?

Lookups use official records from Crossref, OpenLibrary and Google Books, so details like volume, issue and pages come from the publisher. Check capital letters in titles and anything you type yourself.

Does it work on mobile?

Yes. Every tool works in Chrome, Safari and other modern browsers on Android and iPhone. Very large PDF files are faster on a computer.