Turn a stack of scans or phone photos into one tidy PDF, right in your browser.
Drop the images in, drag them into order, straighten and crop any page, pick a paper size, and export. Nothing is uploaded: there's no server, no account and no cookies.
Open Collated → collatedpdf.com · User guide · Changelog
Your files never leave your device. Images are decoded, edited and assembled into a PDF locally, in a Web Worker. The only thing Collated counts is anonymous page views and exports. See the privacy notice.
- Add pages from JPG, PNG, HEIC, WebP, AVIF, GIF, BMP, TIFF and PDF files. Drag them in, pick files or paste, or take a photo on a phone.
- Arrange by dragging, touch or keyboard. Select several pages at once to duplicate or remove them, insert a blank page, reverse the order, or sort by name or date.
- Fix a page: rotate, straighten (automatically or by hand), scale, Fit or Fill, crop to the paper, and clean it up with Greyscale, Enhance or B&W filters.
- Page setup: Letter, A4 and other sizes, a custom size or Match image, orientation and margins. Defaults follow your locale.
- Export a PDF at High, Balanced or Small quality with a size estimate, a filename and title, and page numbers. Or save the pages as JPG or PNG.
- Everyday comforts: undo and redo, work kept across a reload, a print-resolution check, and light and dark themes.
- Scanning: a live camera scan that finds the page and shoots on its own, auto-crop for every photo, interleaved fronts and backs for two-sided scans, blank-page removal, and auto-rotate by reading the text.
- Fill and sign: draw, type or photograph a signature, and keep it on the device if you like. Add text, dates, ticks and crosses to forms that have no fields.
- Privacy and security: real redaction that removes what's under the box, a watermark that can be burned in, AES-256 passwords, and opening password-protected PDFs.
- Searchable text (OCR): 23 languages in the Latin, Greek and Cyrillic alphabets, recognised on the device.
- Layout: 2 or 4 pages per sheet, ID card front and back at real size, and booklet and poster printing with cut marks.
- Document structure: bookmarks by section or one per imported file, splitting into several PDFs by range or every N pages, exporting only selected pages, a file size limit, and shrinking existing PDFs.
- Archiving: PDF/A-2b output, checked with veraPDF.
- Install as an app: works offline, appears in the share sheet, and opens PDFs and images from the desktop.
Jumping straight to one job? There are task pages for JPG to PDF, Merge PDF, Scan to PDF, Sign a PDF, Compress a PDF and HEIC to PDF.
Requires Node 22+.
npm install
npm run dev # http://localhost:5173/
npm run check # prettier --check, eslint, tsc, vitest
npm run build # hosting:check, tsc, vite build → dist
npm run verify # real-browser E2E against the build (needs Playwright's Chromium)npm run verify serves the build with the production headers from vercel.json and drives the app in Chromium: it imports a mixed batch, reorders by keyboard, rotates, undoes and exports. It fails on any console error, CSP violation or axe WCAG 2.2 AA violation, and saves screenshots to shots/. Install a browser once with npx playwright install chromium, or point CHROME_PATH at an existing Chromium.
Some PDF tests render the output with poppler's pdftoppm, and are skipped if it isn't installed (apt install poppler-utils or brew install poppler). CI installs it.
src/core/ pure, framework-free: model, page sizes, geometry, reducer + undo, image headers, PDF build
src/import/ browser decoding, thumbnails, the out-of-state byte store
src/export/ the export worker and its client
src/state/ React hooks and settings persistence
src/components UI
scripts/ hosting:check, verify
tests/ fixtures (with the script that generates them) and helpers
design_notes.md explains how Collated is built: one layout function shared by the preview and the PDF, keeping scans and PDF pages untouched, the image filters and paper detection, OCR, and the strict CSP. Each decision has a short record in docs/adr/.
Collated is a static site on Vercel, served from the root of its own origin, collatedpdf.com. It owns its security headers in vercel.json. The old address, mattblack.space/tools/collated/…, redirects permanently to the same path here.
Issues and pull requests are welcome. See CONTRIBUTING.md.
MIT © Matt Black. Bundled libraries and their licences, including libheif (LGPL-3.0, loaded as a separate replaceable file), are listed in THIRD-PARTY-NOTICES.md. The built site carries it and the licence texts under licenses/.