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01 / Santre PDF

Santre PDF

Every PDF job in one window.

Read, organise, comment on, fill, redact and sign PDFs in one window. Santre PDF is made for reviewers, legal teams and office staff, and every save keeps the original file safe, with undo still working after you save.

Alternative toAdobe Acrobat

See what it doesAll apps

Spring catalogue proof with review comments

Sample content

Santre PDF with fictional sample content. The window follows the layout of the established application it is built on.

02 / Capabilities

What is inside.

  • Reading that holds up

    Pages render faithfully, including right-to-left scripts and vertical Japanese, and stay sharp at any zoom. Find-as-you-type search and text selection follow the reading order, even across columns.

  • Organise, combine, split

    The Organize grid rotates, deletes, inserts, moves and duplicates pages. Combine files with each one nested in the bookmarks, extract pages or split every few pages, and links, form fields and attachments come along.

  • Threaded comments

    Add notes, highlights, shapes, ink, text boxes and stamps, then reply, set a status and print a comment summary. Comments travel to other PDF tools as FDF or XFDF.

  • Forms, filled and built

    Fill and clear form fields, add new ones and change many fields at once. Form data imports and exports as FDF, XFDF, XML or CSV.

  • Redact and protect

    Redact by hand or by search pattern, and sanitise hidden data before a file goes out. Passwords and permissions use encryption up to AES-256.

  • Digital signatures

    Sign with a .p12 or .pfx digital ID and add a trusted timestamp. Signatures are checked for revocation, and certificates can be imported as trusted.

  • Saves that keep the original

    Changes are added to the file without rewriting what was there, and undo still works after a save.

  • Combining without breakage

    Merged and split files keep their links, form fields, layers and attachments.

  • Opens difficult files

    Damaged PDFs are repaired on opening, and every standard password scheme is supported.

03 / Workflows

In practice.

  1. Assemble a legal binder

    Combine the exhibits into one PDF with each file nested in the bookmarks, then redact account numbers by search pattern. Sanitise the file, add a password and sign it with your digital ID before it leaves the office.

  2. Review a revised contract

    Compare the old and new versions to get a PDF report of the changes. Comment on the clauses that need work, set each thread's status and export a comment summary for the other side.

  3. Make scanned records searchable

    Create a PDF from a folder of scanned TIFF or JPEG pages, then run Scan & OCR to add a hidden text layer. The pages can now be searched and copied from.

Made for

  • Legal and compliance teams

    Assemble, redact, sanitise, password-protect and sign document bundles.

  • Reviewers and editors

    Comment in threads, compare versions and exchange comments with other PDF tools.

  • HR and administration

    Build and fill forms, then export the answers to CSV.

  • Records and accessibility staff

    Open damaged files, make scans searchable and run the Accessibility Checker before publishing.

04 / Files and workspace

Opens and saves.

Opens
.pdf.jpg.png.tif.gif.bmp.jp2.txt.fdf.xfdf.xml.xdp.csv.p12.pfx
Saves
.pdf.png.jpg.tif.txt.docx.pptx.rtf.html.fdf.xfdf.csv

Images and text become new PDFs; .docx, .pptx, .rtf and .html exports keep the text but not the exact layout, and OCR reads Latin-script text only.

At the desk.

  • Tabs for every file

    Open many PDFs in one window, see which have unsaved changes and reopen a tab you just closed.

  • Command palette

    Press Ctrl+K to find any tool by name, or browse the All tools panel.

  • Side panels

    Bookmarks, thumbnails, comments, form fields, layers and attachments each have their own panel.

  • Panels that dock

    Tools and Inspector panels split, float and stack, and Reset Panel Layout puts them back.

  • Read mode and themes

    Continuous, single-page and two-up views, full screen, and light or dark themes.

  • Autosave and recovery

    Work is saved every minute and recovered after a crash.

05 / Questions

Good to know.

Can Santre PDF edit the text in an existing PDF?
Editing existing text and images is still being built and is on the roadmap. Today you can add comments, text boxes, stamps and form fields, redact content and reorganise pages.
Can Santre PDF redact sensitive information?
Yes. Redact by drawing over content or by searching for a pattern such as an account number, then sanitise the file to remove hidden data.
Can Santre PDF make scanned documents searchable?
Yes, for Latin-script text without accents. Scan & OCR adds a hidden text layer so the pages can be searched and copied from.

06 / The family

Explore the Stack.

Every app in the Stack is designed around one sign-in, one profile and one place for files, so work moves between them.

All apps ↗
Santre DocsExport the signed-off report as PDFSantre LayoutComment on the print proofSantre CADMark up the plotted drawings