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The Flint PDF library
Short, practical pieces on PDFs — fixing a typo, signing a contract, getting a file under 25 MB, picking the right format, dealing with awkward scans. 965 articles and counting.
Redact personal information from PDF
Permanent redaction of personal data — not just visually blacked out, actually removed from the file.
4 minReadRedact vs black-out PDF
Two operations that look identical onscreen and behave completely differently when copy-pasted. The wrong one ruins your day.
4 minReadRemove blank pages from scanned PDF
Scanner blanks gone in one pass — auto-detection plus manual cleanup for any stragglers.
4 minReadReorder PDF by chapter
Chapter-level reordering — move whole chapters in one drag, with bookmark-aware boundaries.
4 minReadReorder PDF pages alphabetically
Alphabetical page ordering for documents where each page is a discrete item — exhibits, contacts, dictionaries.
4 minReadReorder PDF pages by drag
Visual page reordering — grab a thumbnail, drop it where it belongs. The fastest way to fix a jumbled PDF.
3 minReadReorder PDF pages on iPhone
iPhone PDF reordering done right — touch-friendly thumbnails in Safari, no app required.
4 minReadReorder PDF pages on Mac
Two reliable Mac options for reordering PDFs — Preview's built-in sidebar, or Flint in any browser for bigger jobs.
4 minReadReorder PDF with appendix
Appendices that ended up in the wrong place — moved to the end (or elsewhere) in one drag.
4 minReadReorder PDF with thumbnails
Thumbnail-first reordering — big previews you can identify at a glance, fast drag-and-drop placement.
3 minReadReorder scanner output PDF
Scanner output rarely lands perfectly in order. Visual reordering fixes it in minutes, not hours.
4 minReadResize PDF pages to A4
A4 conversion — for global distribution, European printing, ISO compliance. Scale or crop.
3 minReadResize PDF pages to Legal
US Legal-size conversion — for court filings, contracts, and any document needing the taller 8.5×14 inch format.
3 minReadResize PDF pages to Letter
Letter-size conversion — for US printing, US clients, US compliance. Scale or crop to fit.
3 minReadReverse PDF page order
Full PDF reversal — useful for reverse-scanned documents or printer workflows that fed pages in last-to-first order.
3 minReadRotate all pages in a PDF
Whole-document rotation in one click — fix a sideways scan, flip an entire booklet, save the result for good.
3 minReadRotate PDF 180 degrees
Upside-down pages flipped back the right way up — 180-degree rotation in one click.
3 minReadRotate PDF 90 degrees
Ninety-degree rotation in one click — clockwise or counter-clockwise, your choice, saved permanently to the file.
3 minReadRotate PDF and save permanently
View-only rotation doesn't stick. Flint writes rotation into the PDF so it travels with the file everywhere.
3 minReadRotate PDF clockwise
Clockwise 90° rotation, one click per turn — for fixing pages where the top should be on the right.
3 minReadRotate PDF counter-clockwise
Counter-clockwise 90° rotation in one click — for pages where the top should be on the left.
3 minReadRotate PDF with mixed orientations
Mixed-orientation PDFs fixed in one session — group by what's wrong, rotate each group, save the result.
4 minReadRotate PDF without quality loss
Rotation is metadata, not re-rendering. Quality is preserved bit-for-bit when you rotate in Flint.
3 minReadRotate scanned pages correctly
Scanner rotation issues are common and fixable — here's how to fix all of them in one Flint session.
4 minReadRotate a single page in a PDF
Precision page rotation — fix exactly the page that's wrong, leave everything else alone.
3 minReadSplit a massive PDF into emailable pieces
When the attachment limit defeats you, split first. Get parts that each slip through email size caps.
4 minReadSplit PDF after cover page
Pull the cover or title page off the front of a PDF so you can route it separately — or replace it entirely.
3 minReadSplit PDF by bookmarks
Bookmark-aware splitting — turn each chapter, section, or named region into its own PDF without manually setting ranges.
4 minReadSplit PDF by content
When pages don't have bookmarks but do have predictable text markers, split a PDF wherever those markers appear.
4 minReadSplit PDF by file size
Email and portal size limits don't have to ruin your day — split a too-big PDF into parts that each fit under the cap.
4 minReadSplit PDF by odd and even pages
Odd pages in one file, even pages in another — useful for fixing duplex-scanner mishaps and printer-driver workflows.
3 minReadSplit PDF by page orientation
Mixed-orientation PDFs split into a portrait file and a landscape file, in case you want them separate for printing or distribution.
3 minReadSplit PDF by page range
Pull out exactly the page ranges you need from a long PDF, with range syntax that supports multiple non-contiguous sections.
3 minReadSplit PDF every N pages
Fixed-interval PDF splitting. Set a chunk size, get a ZIP of evenly-sized PDFs in seconds.
3 minReadSplit PDF into chapters
Turn a 400-page book or report into 12 chapter-sized PDFs, easier to share, easier to read, easier to update later.
4 minReadSplit PDF into single pages
One PDF in, N single-page PDFs out — clean, sequential, ready for whatever per-page workflow needs them.
3 minReadSplit PDF keeping bookmarks
Bookmark-preserving splits — each output PDF retains the bookmark subtree relevant to its pages, not a flat list.
3 minReadSplit scanned PDF into pages
Per-page output from a scanned PDF, ready for OCR, archival, or routing to different people.
3 minReadSplit textbook PDF by chapter
Studying smarter: split a 600-page textbook PDF into chapter files so each week's reading is a single focused download.
4 minReadSwap two pages in a PDF
When exactly two pages are swapped, a dedicated swap operation is faster than dragging — Flint has it.
3 minRead