Tất cả bài viết
background-color
edit
reading
Change PDF Background Color (and When It Can't Work)
Give a PDF a cream, sepia-like or pastel background in your browser, why it does nothing on a scan, and the honest fixes for dark mode and white paper.
7 thg 10, 2026Đọc trong 5 phút
page-dimensions
print
page-size
How to Check PDF Page Size in Points, Inches or mm
What size is your PDF? Read every page in points, inches or mm, spot an A4 page hiding in a Letter file, and see why PDF sizes are measured in points.
7 thg 10, 2026Đọc trong 6 phút
combine-single-page
organize
n-up-pdf
Combine PDF Pages Into One Long Page, Free
Stack every page of a PDF into one tall scroll or one wide strip, in your browser. When that beats N-up, the 200-inch ceiling, and what stays sharp after.
7 thg 10, 2026Đọc trong 6 phút
font-to-outline
printing
fonts
Convert Text to Outlines in a PDF (and Keep a Master)
Your printer wants fonts outlined. Why they ask, what you give up (search, edits, accessibility), and how to outline a copy while the master stays editable.
6 thg 10, 2026Đọc trong 7 phút
psd-to-pdf
convert
photoshop
PSD to PDF: Share Photoshop Files Without Photoshop
Convert a PSD to PDF so anyone can open it. What carries over (the flattened image), what does not (layers, CMYK), and the settings that trip people up.
6 thg 10, 2026Đọc trong 6 phút
xps-to-pdf
convert
windows
XPS to PDF: Convert XPS and OXPS Files Anywhere
Printed to Microsoft XPS Document Writer by mistake? What an .xps or .oxps file is, the free fix built into Windows, and how to convert it on any computer.
6 thg 10, 2026Đọc trong 6 phút
digital-signature
security
certificates
Digital Signature PDF: Sign With a Real Certificate
A digital signature in a PDF is maths, not ink. What a certificate signature proves, how to add one in your browser, and how to check one you received.
5 thg 10, 2026Đọc trong 8 phút
djvu-to-pdf
convert
scanned-documents
DjVu to PDF: Convert Old Scanned Books and Papers
DjVu squeezes a scanned book into a few megabytes, then almost nothing opens it. How to convert DjVu to PDF, pick a sane size, and get search back.
5 thg 10, 2026Đọc trong 7 phút
mobi-to-pdf
convert
ebooks
MOBI to PDF: Convert DRM-Free Kindle Books
Your .mobi or .azw3 file converts to PDF in seconds if it's DRM-free, and not at all if it came from the Kindle store. How to tell which one you have.
5 thg 10, 2026Đọc trong 6 phút
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Mọi bài viết trên OxygenPDF — tổng cộng 118 bài.
- How to Extract Attachments From a PDF (Both Kinds)
- JSON to PDF: A Readable Copy of Any API Response
- Stirling PDF Alternative: No Docker, No Server
- What Is a Linearized PDF? Fast Web View Explained
- Print Ready PDF: The Checklist Printers Actually Use
- How to Sanitize a PDF: Remove What Readers Can't See
- PDF to Kindle: Send It So the Text Isn't Tiny
- How to Straighten a Scanned PDF and Fix Crooked Pages
- PDFgear Alternative for Linux, Chromebook and Work PCs
- How to Convert CBZ to PDF in the Right Page Order
- PDF to EPUB: Why Converters Break It and How to Fix It
- Remove Annotations From a PDF Before You Share It
- How to Add Letterhead to a PDF on Every Page
- How to Check Broken Links in a PDF (and Fix Them)
- How to Export PDF Highlights to Markdown or JSON
- Add Margins to a PDF for Notes in GoodNotes or Notability
- Add a QR Code to a PDF, or a Barcode on Every Page
- Make a Signature Transparent: Photo to PNG, No Box
- Add a Table of Contents to a PDF (and Bookmarks)
- Make Citations Clickable in a PDF Thesis or Paper
- Remove Blank Pages from a PDF After a Duplex Scan
- PDF Page Too Large? Fix the 200-Inch Acrobat Limit
- Print Passport Photos at Home at the Exact Size
- Print a Poster on Multiple Pages From Any PDF
- Change Text Color in a PDF Without Retyping It
- Print an ID Card Front and Back on One Page, True Size
- Split Scanned Pages in Half: One Book Spread, Two Pages
- Change PDF Background Color (and When It Can't Work)
- How to Check PDF Page Size in Points, Inches or mm
- Combine PDF Pages Into One Long Page, Free
- Convert Text to Outlines in a PDF (and Keep a Master)
- PSD to PDF: Share Photoshop Files Without Photoshop
- XPS to PDF: Convert XPS and OXPS Files Anywhere
- Digital Signature PDF: Sign With a Real Certificate
- DjVu to PDF: Convert Old Scanned Books and Papers
- MOBI to PDF: Convert DRM-Free Kindle Books
- CSV to PDF: Print a Wide Table That Stays Readable
- Extract Images From a PDF at Full Resolution
- PDF to TIFF: Which DPI and Compression to Pick
- TIFF to PDF: Convert Multi-Page Scans and Faxes
- Convert PDF to Grayscale or Black and White
- SVG to PDF: Keep Vector Art Sharp for Print
- How to Increase PDF Brightness Without Fading the Text
- PDF to SVG: How to Get Real Vectors, Not a Picture
- How to Repair a Corrupted PDF That Won't Open
- How to Make a PDF Look Scanned (and When Not To)
- How to Print a PDF as a Booklet That Folds Right
- TXT to PDF: Convert a Text File Without Wrecking It
- PDF to PowerPoint: Editable Slides or Exact Copies?
- How to Remove Metadata From a PDF (All of It)
- What Is PDF/A? 1b, 2b, 3b and PDF/A-4 Explained
- How to Convert PDF to CBZ for Kobo and KOReader
- PDF to Markdown for LLMs and RAG, Done Locally
- How to Save an Email as PDF With Its Attachments
- EPUB to PDF: Print and Mark Up Your DRM-Free Ebooks
- Convert PowerPoint to PDF, With or Without Office
- How to Password Protect a PDF Before You Email It
- How to Convert HEIC to PDF Without Uploading Your Photos
- Markdown to PDF Without Installing Pandoc or LaTeX
- How to Reverse PDF Page Order and Fix Backwards Scans
- How to Edit a Scanned PDF: Three Routes That Work
- Handwriting OCR: What Actually Reads Handwriting
- PDF Bates Numbering Without Acrobat Pro
- Blank PDF, Sample PDF, Dummy PDF: What You Actually Need
- Why Your PDF Is 38 MB, and What Compression Actually Does
- Best Free PDF Reader & Viewer (2026): 5 Options Compared
- Google Drive OCR Stops at Page 10 and Never Says So
- Make a PDF Searchable: Why Ctrl+F Finds Nothing
- The Honest Open Source PDF Editor Survey for 2026
- PDF to HTML: Why the Output Is a Pile of Divs
- PDF-XChange Editor Alternative: Free, No Watermark, Any OS
- Printable Calendar PDFs: Why Yours Prints Wrong
- Wondershare PDFelement Alternative: What It Sends Out
- Convert Excel to PDF Without Mangling Columns
- How to Remove Watermarks from a PDF Without Ruining It
- How to Speed Read a PDF: What RSVP Actually Buys You
- Print Multiple Pages Per Sheet Without Wrecking the Margins
- PDF Dark Mode: What It Fixes and What It Breaks
- How to Compare Two PDFs and Find Every Difference for Free
- How to Crop PDF Pages and Remove the Margins for Good
- How to Extract Pages from a PDF and Keep Only What You Need
- Printable Graph Paper: Why Your Squares Come Out Wrong
- College Ruled vs Wide Ruled: Which Paper You Need
- PDF Markup Software: What to Check Before You Subscribe
- PDF24 Alternative for Anyone Without a Windows PC
- A Free iLovePDF Alternative for the 15 MB OCR Wall
- Smallpdf Alternative for the Two-Conversions-a-Day Wall
- How to Add Page Numbers to a PDF Without Paying for Acrobat
- Scan to Text: Why Your Photo Reads as Garbage to OCR
- How to Rotate PDF Pages Without Uploading Anything
- How to Convert PDF to Excel Without Retyping Tables
- How to Annotate a PDF So Your Markup Survives Anywhere
- Adobe Acrobat OCR: Where It Hides and What It Costs
- Convert HTML to PDF in Your Browser, No Upload Needed
- OCR Text Recognition: How a Machine Reads Paper
- OCR a Scanned PDF: Make It Searchable and Verify It Worked
- How to Redact a PDF So the Text Is Really Gone for Good
- How to Save a Webpage as a PDF on Any Browser or Phone
- Flatten a PDF: What It Means and When You Need It
- How to Watermark a PDF Without Uploading It Anywhere
- Sejda PDF Editor Alternative for the 3-Tasks-Per-Hour Wall
- Foxit PhantomPDF Alternative That Skips the Watermark
- Online PDF Viewer That Skips the Sneaky Upload
- Adobe Acrobat Alternative: A Free Way to Edit a Simple PDF
- Free PDF Sign and Fill, No Account, No Email Capture
- How to Unlock a PDF Password Without Handing It to Strangers
- Word to PDF Converter That Never Uploads Your Files
- PDF to Word Conversion: What Really Happens to Your Document
- Why Local-First PDF Tools Matter for Privacy and Speed
- How to Convert a PDF to JPG Without the Blurry Mess
- How to Split PDF Pages Without Uploading Anything
- How to Convert JPG to PDF Without the Hidden Costs
- How to Compress a PDF Without Losing Quality — Free
- Free Online PDF Editing: Which Features Actually Work
- PDF to Text Converter: Why It Fails and How to Fix It
- How to Merge PDFs Without Uploading Them Anywhere
- Building PDF Tools with WebAssembly in the Browser
- Fillable PDF Forms Without the $240/Year Adobe Tax