Object Streams
이 콘텐츠는 아직 번역되지 않았습니다.
Definition
Section titled “Definition”A PDF is a collection of numbered objects — page resources, fonts, metadata, content — and an object stream is a compressed container that packs many of those objects into one stream. Files written with uncompressed, individually-listed objects are larger than they need to be, and editors that append updates make the situation worse with each save. Compressing object streams is a size change with no visible change.
Example
Section titled “Example”A 60-page text report saved repeatedly by an editing application, where every save appended new structures instead of consolidating them. Rebuilding the object streams removes the redundant layers and packs the remaining objects — the report renders identically, every word in place, while the file becomes substantially smaller.
In the PDFLean tools
Section titled “In the PDFLean tools”- compress a PDF — the lossless structural rebuild
- decompress a PDF — the reverse, expanding streams for legacy tools
Related reading
Section titled “Related reading”- Incremental Update — why repeated saves leave the redundant layers
- Lossless and Lossy Compression — the distinction this operation depends on
- Compress a PDF Without Uploading It — the guide that walks the rebuild