Is ODD the same as ODG?

ODD is the legacy file extension for OpenDocument Drawing files, used by Apache OpenOffice 1.x and 2.x before the ISO standardization of OpenDocument in 2006 replaced it with the now-canonical .odg extension. Internally an ODD file is identical to an ODG - a ZIP archive containing vector shape XML, embedded raster images, page metadata, and theme references. Converting ODD to HEIC produces the same output as ODG-to-HEIC conversion; the distinction matters only at the filesystem level when receiving older files from archived OpenOffice 2.x installations or NeoOffice on legacy Mac systems.

The audience for ODD-to-HEIC is narrow but specific: archivists migrating institutional file shares created between 2005 and 2012 when OpenOffice 2.x was dominant on Linux and select Mac workflows, government records management staff converting older Brazilian, German, and Indian public-sector archives, and anyone who wants those legacy drawings preserved as compact, modern image files. The conversion rasterizes each page into one HEIC at the document's set page dimensions, preserving vector shapes, embedded photos, custom typography, and dimension lines exactly as they appear in Draw's print preview - at roughly half the storage a JPG archive would need, which matters when digitizing thousands of pages.

Modern LibreOffice Draw 5.x and later reads ODD natively without any extension renaming, and writes ODG by default. If you receive an ODD file and want to keep it editable, open in LibreOffice Draw and File > Save As to ODG (or to SVG for cross-app handoff). For visual-only archiving convert directly to HEIC - and if the images later need to reach Windows or Android recipients, run them through HEIC to JPG. See HEIC-to-ODD for the reverse direction and ODG-to-HEIC for the modern extension's equivalent.

Reasons to convert ODD to HEIC usually come down to compatibility, file-size, or specific feature requirements. Common situations:

• An app or platform only accepts HEIC uploads.
• You need a feature unique to HEIC (e.g. transparency, vector scaling, animation, multi-page pages, etc.) that ODD doesn't provide.
• You're optimising file size — modern formats often produce smaller files than the older format you started with.
• You need a single archival format across a project so files behave consistently in the same viewer.

1. Open the ODD → HEIC tool on heic.now.
2. Drag your ODD file onto the drop zone, or click Select files. You can drop a whole folder of files at once.
3. The output is fixed to HEIC. If the format supports extra options (page size, transparency background, quality, EXIF stripping), tweak them in the right-hand panel.
4. Click Convert. The job runs on our server and finishes in a few seconds for typical photos.
5. Download the result. Files stay in storage for 24 hours and are then permanently deleted.

The entire flow is free for the first 10 jobs per day with no signup required. A free account doubles that quota; a premium plan removes the limit entirely.

• Rename .odd to .odg in Finder or Explorer if your software doesn't recognize the older extension - LibreOffice Draw reads it identically.
• If the ODD was created in OpenOffice 2.x, double-check fonts after opening in modern LibreOffice - some commercial fonts of that era are no longer installed by default.
• Use File > Save As > ODG inside Draw to migrate the file to the canonical modern extension before further editing.
• ODD files are ZIP archives despite the unusual extension - rename to .zip and extract to recover embedded images byte-for-byte.
• For institutional archives with mixed ODD and ODG files, batch-rename ODD to ODG with a shell or PowerShell one-liner before opening in current Draw.