Edit text and images, redact, sign, fill forms and run OCR — then prepare books for print with preflight, page numbering, crop & bleed marks, imposition and side-by-side version compare. All on your own device. Nothing is uploaded, ever.
Every edit, signature, and redaction happens on your device — so your contracts, tax forms, and medical records never leave your hands.
Nothing is uploaded, cached on a server, or scanned for advertising. What you open on your computer stays on your computer.
Download it and use it. There’s no signup wall, no monthly fee, and no feature locked behind “Pro.”
On a plane, in a secure facility, or on a spotty connection — Author Services PDF doesn’t need the internet to do a single thing.
One app for the whole job — no upsells, no “that feature costs extra.”
Change the text and images already in a PDF. Retype a line, adjust fonts, add new text anywhere, insert pictures, or white out what you don’t need.
Highlight, underline, and strike through text, and drop sticky-note comments anywhere on the page.
Freehand pen plus rectangles, ellipses, lines, and arrows for marking up contracts and diagrams.
Search across the whole document and swap text out, with the option to permanently remove the original words.
Stamp text or an image across your pages, with control over opacity, angle, tiling, and which pages get it.
View and change a document’s title, author, subject, and keywords.
Black out sensitive information for good — the content is permanently removed, not just hidden under a box.
Scan for Social Security numbers, emails, phone numbers, and card numbers, then remove them all in one pass.
Open encrypted PDFs, add AES-256 encryption to protect a file, or remove a password you already know.
Complete any fillable PDF with live fields and tab navigation, then save your answers into the file.
Add your own text fields, checkboxes, dropdowns, and radio buttons to turn a flat page into an interactive form.
Draw, type, or import your signature, save it for reuse, and place it anywhere. No printing or scanning.
Shrink oversized PDFs — a lossless mode for everyday files, or reduce heavy scans and images to a target resolution (96–300 DPI).
Combine any number of PDFs, or split one by page, by range, into chunks, or down the middle of a page.
Reorder, rotate, delete, and insert pages by dragging thumbnails — and extract pages to one PDF or as separate files, deleting them afterward if you like.
Turn pages into PNG or JPEG images, build a PDF from photos, or export text to Word (.docx).
Apply one operation — compress, resize, watermark, or add crop & bleed marks — to a whole folder of PDFs at once, writing the results alongside untouched originals.
Retrim to a new size — 6×9, Letter, A4 or a custom trim — with content scaled to fit, or resize everything by a percentage.
Match book page numbers to the PDF: roman numerals for front matter, page 1 where the book actually begins. Reads and writes standard page labels.
See any page’s exact trim size in the corner as you work — switch instantly between inches, millimetres, and points.
Add corner trim marks, registration marks, and a bleed area for the printer — your trim size is preserved as the PDF TrimBox.
Arrange pages onto printer sheets: saddle-stitch booklets (fold-and-staple order) or N-up grids for proofing.
Detect chapter and section headings by their font size and build a clickable, nested bookmark outline in one click — review and adjust levels before it’s written.
One-click print-readiness report: non-embedded fonts, low-resolution images, RGB vs CMYK colour, spot colours, and page-size consistency — with a DPI threshold you set.
See every font in the document, its type, and whether it’s embedded and subset — so nothing surprises your printer.
For each image on a page: pixel dimensions, colour mode (RGB, CMYK, grayscale or spot), bit depth, compression, and effective resolution in DPI.
Drag to measure any distance on the page, in inches, millimetres, or points.
Embed source files, fonts, or notes inside the PDF, and extract them again later.
See exactly what changed between two versions — a page-by-page visual diff that highlights altered areas in red, plus the added and removed words, with an exportable side-by-side report.
Make scanned documents searchable, or extract their text — in eight languages (English, Spanish, French, German, Italian, Portuguese, Dutch and Polish), all on-device.
Capture paper with your camera. Edges are found, the angle corrected, and the image cleaned up automatically.
Open several PDFs at once, with single, double-page, or continuous scrolling, plus night and eye-comfort modes.
Add clickable links and a real bookmark outline to make long documents easy to move through.
Send any document straight to your printer through the standard dialog.
No download, no .dmg or .exe to install. Works on any device with a browser — Windows, Mac, Linux, even a Chromebook. Your files still never leave your device.
Windows may show a blue “Windows protected your PC” window. That’s expected for new, independent software — it means the file is unfamiliar to Microsoft, not that anything harmful was found. Click More info, then Run anyway. You can also use the browser version, which installs nothing.
Yes. Every feature is free for personal and commercial use. There’s no trial, no paywall, and no “Pro” upgrade.
No account to create — just the shared access password (ask your team). That unlocks the app and downloads; everything then runs on your own device.
Never. Signing in only unlocks access — it doesn’t change how the editor works. All editing happens on your own device, in the app or your browser tab, with nothing uploaded.
Yes — it’s built for it. Run a preflight check for non-embedded fonts, low-resolution images and RGB vs CMYK colour; set book page numbering (roman front matter, page 1 where the book begins); read a page’s exact trim size; add crop & bleed marks; impose pages into saddle-stitch booklets or N-up sheets; resize or retrim; auto-build a table of contents; and compare two proofs side by side to see exactly what changed.
They’re the same editor. The browser version needs nothing installed and works on any operating system. The download works offline forever, handles very large files more comfortably, and integrates with your file manager.
The browser version runs anywhere with a modern browser. Desktop downloads are available for Windows 10/11, macOS (Apple Silicon and Intel), and 64-bit Linux.
No. SmartScreen shows that notice for installers it doesn’t yet recognize, and this is a new, independent app. Click More info, then Run anyway — or just use the browser version, which installs nothing. You can also verify the file on VirusTotal or install with your internet disconnected, since the app works entirely offline.
No. The Mac download is signed with our Apple Developer ID and notarized by Apple, so it installs and opens with no warnings.
Open a PDF and start editing — in your browser or on your desktop. Free, private, and yours.
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