Merge PDF Without Losing Quality
Why some merge tools blur logos and how vector-preserving merge works.
Published June 12, 2025 · 1 min read
Bad merge tools rasterize pages into low-DPI JPEGs — logos blur and text looks hollow. Quality merge copies page objects without re-encoding.
Signs your merge tool is low quality
- File size jumps unpredictably
- Text is not selectable after merge
- Vector logos look jagged
RatPDF approach
iText smart mode preserves vectors. After merge, run compression only if size requires it — not by default.
Sources & references
Primary references used when researching and fact-checking this guide. See our editorial methodology.
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Adobe PDF Reference — encryption
— Adobe
PDF password protection and encryption standards (ISO 32000). -
Ghostscript documentation — PDF settings
— Artifex Software
Compression level behavior and PDF output settings.