ODG to HEIC Converter

ODG to HEIC Converter

HEIC is the Apple-facing name for a HEIF file carrying HEVC-coded images — the format an iPhone writes when "High Efficiency" is selected in the camera settings, standardised as ISO/IEC 23008-12. An .odg is the opposite kind of thing: an OpenDocument Graphics drawing from LibreOffice Draw, made of shapes, connectors and text frames rather than pixels. This converter renders the Draw document page by page and encodes each render as a HEIC. It works, and this page is mostly about whether it is what you actually want — because HEVC-based coding is tuned for photographs, and a diagram is the content type it handles worst.

How to Convert ODG to HEIC

1. Upload Your ODG File: Drag the .odg onto the page or click "+ Add Files". The whole Draw document is read, so a multi-page file needs no splitting first.
2. Pick a Quality Preset: "Quality Preset" runs Highest, Very High (Recommended), High, Medium, Low, Very Low and Lowest, opening on Very High. Stay at the top for line art — HEVC's artefacts appear first along exactly the crisp strokes a Draw document is made of. "Specific file size" is available if a hard byte ceiling is the constraint.
3. Set the Image resolution: "Image resolution" opens on "Keep original" and also accepts a Resolution Percentage, a preset height, or an explicit Width x Height. Reducing dimensions is the gentler way to shrink a diagram; reducing quality is the harsher one.
4. Convert and Download: Click "Convert" and save the image. Files travel over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours together with anything they produce. No sign-up, no watermark.

Is HEIC the Right Target for a Diagram?

For most Draw documents HEIC is the wrong answer. It earns its place when something downstream insists — an Apple Photos library, an app that ingests only HEIC, a device whose export pipeline is built around it.

What Happens Between Upload and Download

A .odg is a page-layout document, not a picture, so it goes through the office pipeline rather than an image converter:

At 300 DPI a US Letter page (8.5 × 11 in) arrives near 2550 × 3300 px and A4 near 2481 × 3507 px — plenty of detail, and rather more than most uses need, which is what "Image resolution" is for.

Frequently Asked Questions

What is the difference between HEIC and HEIF?

HEIF is the container standard, ISO/IEC 23008-12, and it can hold images coded with different codecs. HEIC is the common name for HEIF files whose images are HEVC-coded, and it is what Apple devices write. In practice the .heic and .heif extensions are often used interchangeably, and a receiving application may accept one spelling and not the other — ODG to HEIF covers the same conversion under the other name.

Why does a diagram look soft as a HEIC?

Because HEVC is a video codec adapted to still images, and video codecs are built to compress smooth, continuous tone efficiently. Flat fills bounded by crisp strokes are the opposite of that, so the encoder spends its bits badly and leaves haloing along the edges and softened small type. Raise the quality rung if you must stay with HEIC, or use a lossless format for line art.

Will HEIC keep the transparency in my drawing?

The format supports an alpha channel, so transparency can survive an encode in principle, and the render stage does not flatten it. Two caveats: if the Draw page has a background fill set under Page ▸ Page Properties ▸ Background, there is no transparency to preserve in the first place; and support for HEIC alpha outside Apple's ecosystem is uneven. When the transparent background genuinely matters, ODG to PNG is the target that works everywhere.

My Draw file has several pages — can one HEIC hold them all?

No. The HEIF container can hold image collections, but a collection is not a paginated document and this route does not produce one. Each page becomes its own .heic, numbered in page order and delivered together. If you want the pages kept together as pages, ODG to PDF is the format built for that.

Will the text remain selectable?

No. Rasterising turns text into pixels, so nothing in a HEIC is selectable or searchable. Keep the .odg as the editable master; if live text is required downstream, ODG to PDF or ODG to SVG preserves it.

Will a .heic open on Windows or Android?

Not always without help. Apple platforms handle HEIC natively; Windows needs Microsoft's HEIF and HEVC extensions installed, and Android support varies by version and manufacturer. Browsers largely do not display HEIC at all. If you are sending the file to someone whose setup you do not know, convert to PNG or JPG instead and keep HEIC for the pipeline that asked for it.

Which quality rung should I use for text-heavy artwork?

Very High or Highest. The lower rungs are tuned for photographic content and start smoothing exactly the high-contrast boundaries that make small labels legible — and once smoothed, the detail cannot be recovered. If the file is still too large, reduce "Image resolution" instead: downscaling a diagram degrades it far more gracefully than crushing its quality.

Does the HEIC keep any of the drawing's metadata?

Not in a useful form. HEIF supports Exif and XMP blocks, but the document properties an ODG holds — author, title, keywords, the object model itself — are not carried into them by this conversion. Treat the image as a picture of the drawing and keep the original file as the record.

How are my files handled during conversion?

Every upload travels over an encrypted connection, is processed on our servers, and is deleted automatically a few hours later along with any output. Nothing is shared, published or reused, no account is needed, and no watermark is applied. The ODG converter hub lists every other target available for this source.