FILE FORMAT GUIDES

Know your format.
Choose a better output.

Learn what common file formats preserve, where they work best, and what to check before converting.

Browse format guides

01

FORMAT LIBRARY

Practical guides for everyday files.

Each guide explains the format in plain language and links only to useful, supported conversions.

PDF format guideA fixed-layout document format designed for consistent viewing and printing. JPG format guideA compact photo format supported by virtually every browser and device. PNG format guideA lossless image format that supports sharp edges and transparency. WEBP format guideA modern web image format with efficient lossy or lossless compression. AVIF format guideA highly compressed modern image format. HEIC format guideA space-efficient photo format used by many phones and cameras. DOCX format guideMicrosoft Word's editable document format. XLSX format guideMicrosoft Excel's workbook format. PPTX format guideMicrosoft PowerPoint's editable presentation format. HWP format guideHancom’s traditional binary word-processing format widely used for Korean documents. HWPX format guideHancom’s newer XML-based document format packaged for modern interchange and editing. UOT format guideThe text-document member of China’s XML-based Unified Office Format family. UOS format guideThe spreadsheet member of China’s Unified Office Format family. UOP format guideThe presentation member of China’s Unified Office Format family. UOF format guideA general extension used by China’s Unified Office Format document family. WPD format guideCorel WordPerfect’s legacy editable word-processing format. CHM format guideMicrosoft’s compiled HTML help format containing linked topics, navigation, and supporting files. Text602 format guideThe native document format of the Czech and Slovak Text602 word processor. LWP format guideIBM Lotus Word Pro’s legacy editable document format. DjVu format guideA document format optimized for compact scanned pages with optional OCR text. CDR format guideCorelDRAW’s vector drawing format used for illustrations, signs, and print artwork. VSD format guideThe classic binary Microsoft Visio drawing format for diagrams and technical plans. VSDX format guideMicrosoft Visio’s modern packaged drawing format for diagrams and technical plans. VDX format guideAn XML-based Microsoft Visio interchange format used by older Visio releases. PMD format guideAn Adobe PageMaker publication format used for newsletters, brochures, and print layouts. P65 format guideAn Adobe PageMaker 6.5 publication format used for fixed-page print projects. PM6 format guideAn Adobe PageMaker 6 publication format used for legacy desktop publishing. QXD format guideA legacy QuarkXPress document format used in professional page-layout workflows. QXT format guideA legacy QuarkXPress template format used to start repeatable page-layout projects. ZMF format guideA Zoner Callisto vector drawing format used for illustrations and page graphics. CWK format guideAn AppleWorks or ClarisWorks document container that can hold text, drawing, spreadsheet, or presentation content. WRI format guideThe legacy Microsoft Windows Write word-processing format. PSW format guideThe Pocket Word document format used by Windows CE and early mobile devices. SDW format guideThe legacy StarWriter document format used before OpenDocument became standard. SDC format guideThe legacy StarCalc spreadsheet format used by early StarOffice releases. SDD format guideThe legacy StarImpress presentation format used by early StarOffice releases. KEPUB format guideKobo’s EPUB-derived e-book format optimized for Kobo reading features. ASS format guideAdvanced SubStation Alpha subtitles with timing, positioning, and rich styling. SSA format guideThe original SubStation Alpha subtitle format with timed dialogue and styling. MP4 format guideA widely supported video container commonly using H.264 video and AAC audio. MOV format guideA QuickTime media container common in Apple and editing workflows. MKV format guideA flexible media container that can hold multiple audio and subtitle tracks. WEBM format guideAn open media format designed for browsers and web delivery. MP3 format guideA universally supported compressed audio format. WAV format guideAn uncompressed or lossless audio container used in recording workflows. FLAC format guideA lossless compressed audio format. ZIP format guideThe most widely supported archive format. 7Z format guideA high-compression archive format. RAR format guideA compressed archive format often used for large file sets. EPUB format guideA reflowable e-book format supported by most reading apps. MOBI format guideAn older e-book format used by legacy Kindle workflows. CSV format guideA simple plain-text table format. JSON format guideA structured text format widely used by web applications and APIs. XML format guideA tagged structured-data format used by documents, feeds, and integrations. YAML format guideA human-readable structured-data format often used for configuration. TXT format guidePlain text without layout or embedded media.