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Why Drawing a Black Box on a PDF Doesn't Work (And How to Build Real In-Browser Redaction)

Why Drawing a Black Box on a PDF Doesn't Work (And How to Build Real In-Browser Redaction)

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5 min read
Client-Side PDF Merging: Why "No Upload" File Tools Matter, and How They Work

Client-Side PDF Merging: Why "No Upload" File Tools Matter, and How They Work

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3 min read
What I learned building a bank statement PDF to Excel converter

What I learned building a bank statement PDF to Excel converter

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3 min read
My PDF-to-Markdown converter learned that 'page 3' is a suggestion, and tables are a war crime

My PDF-to-Markdown converter learned that 'page 3' is a suggestion, and tables are a war crime

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2 min read
PDF Integrity Report: September 2026

PDF Integrity Report: September 2026

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8 min read
PDF barrierefrei machen: Diese veraPDF-Fehler (PDF/UA) beheben Sie mit 30 Zeilen Python – gemessen an 39 Dateien

PDF barrierefrei machen: Diese veraPDF-Fehler (PDF/UA) beheben Sie mit 30 Zeilen Python – gemessen an 39 Dateien

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4 min read
I Built Free PDF Tools That Run 100% in the Browser — No Server, No Uploads

I Built Free PDF Tools That Run 100% in the Browser — No Server, No Uploads

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2 min read
Password-protecting a PDF before emailing it, and why the "no printing" box isn't a lock

Password-protecting a PDF before emailing it, and why the "no printing" box isn't a lock

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4 min read
PDF/UA: the veraPDF failures you can fix with 30 lines of pikepdf (measured on 24 files)

PDF/UA: the veraPDF failures you can fix with 30 lines of pikepdf (measured on 24 files)

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4 min read
Stirling-PDF: The 94k-Star Open-Source PDF Platform That Actually Challenges Adobe Acrobat

Stirling-PDF: The 94k-Star Open-Source PDF Platform That Actually Challenges Adobe Acrobat

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4 min read
Page positions, page labels, and printed numbers are different PDF data

Page positions, page labels, and printed numbers are different PDF data

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4 min read
Why Arabic Text Breaks in Browser PDFs (And How to Fix It 100% Client-Side)

Why Arabic Text Breaks in Browser PDFs (And How to Fix It 100% Client-Side)

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3 min read
Why your PDF's text comes out as separate letters

Why your PDF's text comes out as separate letters

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1 min read
How to Read Japanese, German, and Non-English Patent PDFs

How to Read Japanese, German, and Non-English Patent PDFs

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8 min read
Turn PDFs (even scanned ones) into RAG-ready chunks with one API call

Turn PDFs (even scanned ones) into RAG-ready chunks with one API call

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4 min read
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