convrtr
Start converting

Field notes on file formats

Deep dives on the formats, codecs and containers convrtr decodes — fidelity, encryption and recovery, from building a converter that uploads nothing.

76 posts

76 ARTICLES IN ARCHIVE

15 September 20265 MIN READ

Converting ClarisWorks and AppleWorks CWK to Markdown: Recovering Vintage Mac Documents

Learn how to extract text, paragraphs, and headings from vintage ClarisWorks and AppleWorks (.cwk) MacBinary files into clean GitHub Flavored Markdown with 100% private in-browser decoding.

15 September 20265 MIN READ

Converting StarOffice & StarWriter (SDW) to Markdown: OLE Compound Binary Forensics

Recover text, headings, bullet lists, and metadata from vintage StarOffice 3.x–5.x (.sdw) word processing documents. Learn how OLE CFB streams unpack to GitHub Flavored Markdown.

13 September 20265 MIN READ

Converting Hangul Word Processor (HWP) to Markdown: OLE CFB & Deflate Forensics

Unpack Hancom Hangul HWP 5.x compound documents. Discover how OLE 2.0 CFB directory tables, Deflate stream decompression, and HWPTAG_PARA_TEXT record parsers extract clean Markdown in browser memory.