OxygenPDF

OxygenPDF 的部落格

關於 PDF 處理的技巧、教學,以及您需要知道的一切。

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PDF24 Alternative for Anyone Without a Windows PC
comparison
pdf24
free

PDF24 Alternative for Anyone Without a Windows PC

PDF24 is genuinely free with no task cap, and its desktop app processes files locally, but only if you run Windows. Everyone else gets the upload.

2026年9月3日閱讀時間 5 分鐘
An iLovePDF Alternative for the 15 MB OCR Wall
comparison
ilovepdf
free

An iLovePDF Alternative for the 15 MB OCR Wall

iLovePDF earned its 4.9 Trustpilot score and 250 million monthly visits. Its free tier still caps every tool by file size. Here is the alternative.

2026年9月2日閱讀時間 6 分鐘
Smallpdf Alternative for the Two-Conversions-a-Day Wall
comparison
smallpdf
free

Smallpdf Alternative for the Two-Conversions-a-Day Wall

Smallpdf is a well-built Swiss cloud tool that still caps free users at two conversions a day. Here is what to run instead, with no cap and no upload.

2026年9月1日閱讀時間 6 分鐘
Scan to Text: Why Your Photo Reads as Garbage
ocr
scanning
privacy

Scan to Text: Why Your Photo Reads as Garbage

A 12 MP phone shoots 474 DPI when the page fills the frame, 237 when it doesn't. Most failed OCR is a capture problem. Here is what each mistake costs.

2026年8月29日閱讀時間 4 分鐘
How to Annotate a PDF and Keep the Markup Intact
annotate
edit
privacy

How to Annotate a PDF and Keep the Markup Intact

Highlights live on a separate layer from the page. Viewers can skip it and print dialogs can drop it. Annotate a PDF so your markups survive anywhere.

2026年8月26日閱讀時間 3 分鐘
Adobe Acrobat OCR: Where It Hides and What It Costs
ocr
acrobat
privacy

Adobe Acrobat OCR: Where It Hides and What It Costs

Free Reader has no OCR button. Desktop OCR costs $239.88 a year; the free web tool wants your file and an account. The full map, plus a third path.

2026年8月24日閱讀時間 4 分鐘
Convert HTML to PDF in Your Browser, No Upload Needed
convert
create
privacy

Convert HTML to PDF in Your Browser, No Upload Needed

The standard "html to pdf" answer was abandoned in 2023 with an unpatched 9.8-severity CVE. Its replacements want Node.js or your markup on their servers.

2026年8月23日閱讀時間 4 分鐘
OCR Text Recognition: How a Machine Reads Paper
ocr
accuracy
privacy

OCR Text Recognition: How a Machine Reads Paper

OCR text recognition is six separate stages, and four of them never see a letter. Knowing which one failed tells you how to fix your page.

2026年8月22日閱讀時間 8 分鐘
Make a Scanned PDF Searchable and Verify It Actually Worked
ocr
scanned-pdf
privacy

Make a Scanned PDF Searchable and Verify It Actually Worked

Running OCR on a scanned PDF is the easy part. Knowing whether it actually read your document correctly is the part every guide skips. Here is both.

2026年8月21日閱讀時間 12 分鐘

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