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Master format conversion guide for documents, images, audio, video, archives, ebooks
Extract ZIP files locally and download individually; see notes for RAR/7Z
Package multiple files into ZIP archive locally in browser
4 methods to convert Office docs to PDF: Office, WPS, LibreOffice CLI
Batch extract all images from Office documents locally
Fix garbled text files by auto-detecting GBK/Big5/UTF-8 encoding
EPUB/MOBI/AZW3/PDF/TXT conversion via Calibre with install tutorial
Convert between SRT, VTT, ASS subtitle formats with auto time adjustment
Shift SRT subtitle timing forward or backward to sync with video