TwoThink PDF
A PDF toolbox that lives in your browser
Merge, split, compress, convert to images, extract text, and add headers, footers and page numbers — all done locally. Nothing is uploaded, no sign-up, free forever.
100% browser-based
Your files never reach a server, so sensitive contracts and résumés stay private.
No sign-up · free forever
Open and use it straight away — no account wall and no pop-up ads.
Local processing · open and go
Speed depends on your own computer: no queues and no usage limits.
All tools
19 tools in total — every one of them runs locally in your browser
Merge PDF
Merge several PDFs into one file for free — processed in your browser, files are never uploaded. Drag to reorder, then merge in one click.
Split PDF
Split a PDF by page count, page range or a hand-picked selection — processed locally in your browser, downloadable as a single file or a ZIP.
Compress PDF
Compress a PDF locally in your browser without uploading it. A before/after size comparison is shown when the compression finishes.
PDF to Images
Export every page of a PDF as an image in JPG, PNG or WebP, with a resolution setting and an optional page range — packaged as a ZIP.
Images to PDF
Combine multiple images into a single PDF in the order you choose — ideal for scans and screenshots.
Rotate PDF
Rotate the whole document or only the pages you pick, by 90°, 180° or 270° — preview the thumbnails first, nothing is uploaded.
Watermark PDF
Add a text watermark to every page, with adjustable opacity, size, colour and layout — processed locally, never uploaded.
Password Protect PDF
Set an open password on a PDF and optionally restrict printing, copying and editing. The first run downloads a ~2MB encryption module (WASM); everything happens in your browser.
Unlock PDF
Remove PDF protection using a password you already know, so the file can be edited or merged. This site cannot crack or guess unknown passwords; the first run loads qpdf WASM.
Remove PDF Pages
Tick the pages you do not want and keep the rest — preview the thumbnails first, nothing is uploaded.
Reorder PDF Pages
Drag the thumbnails into a new order — the final PDF follows the order you see from top to bottom and left to right.
Sign PDF
Place a text, image or handwritten signature in the bottom-right corner of the page you choose (a visual signature, not a CA digital certificate).
PDF to Long Image
Stitch every page into one tall image, with a width choice and JPG or PNG output — handy for social posts.
PDF Header, Footer and Page Numbers
Add headers, footers and page-number placeholders to a PDF — processed locally in your browser, files are never uploaded.
Extract Text from PDF
Pull the text out of a PDF, including scanned documents via OCR — everything runs in your browser and nothing is uploaded.
Compare PDF
Put two PDFs side by side and highlight the text differences (added, removed, changed) — processed entirely in your browser, files are never uploaded.
Extract Images from PDF
Pull the embedded Image XObjects out of a PDF (photos or logos you inserted) rather than rendering whole pages — processed in your browser, files are never uploaded.
Redact PDF
Drag over the areas that hold sensitive information and black them out — processed locally in your browser, files are never uploaded.
PDF Bookmarks
Add, edit and delete PDF outline bookmarks, with nested levels and an automatic bookmark per page — everything runs locally in your browser.