ODG to HEIF Converter

ODG to HEIF Converter

HEIF — the High Efficiency Image File Format, ISO/IEC 23008-12 — is a modern container for still images, image sequences and their metadata, most often carrying HEVC-coded pictures. An .odg is an OpenDocument Graphics drawing: the editable shapes, connectors and text frames LibreOffice Draw and Apache OpenOffice Draw save as XML inside a ZIP package. Turning a drawing into a HEIF means rendering the document and encoding the pixels, which this converter does page by page. Both formats are set out below, along with an honest assessment of whether HEIF suits a diagram at all.

ODG Format at a Glance

HEIF Format at a Glance

How to Convert ODG to HEIF

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 preparation.
2. Pick a Quality Preset: "Quality Preset" runs Highest, Very High (Recommended), High, Medium, Low, Very Low and Lowest, opening on Very High. Keep it near the top for line art; "Specific file size" is available when a byte ceiling is the real 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. A vector drawing has no native pixel count, so decide the output dimensions deliberately before rasterising.
4. Convert and Download: Click "Convert" and save the file. Uploads move over an encrypted connection, processing happens on our servers, and everything is deleted automatically after a few hours. No sign-up, no watermark, nothing shared or published.

HEIF Compared With the Obvious Alternatives

What Happens Between Upload and Download

A .odg is a page-layout document, not a picture, so the office pipeline handles it: LibreOffice Draw's PDF export filter reads the drawing and writes a PDF that keeps the document's page size and object positions, each PDF page is rendered to a raster at 300 DPI, and libvips encodes each render as HEVC-coded HEIF. One file comes out per drawing page. At 300 DPI a US Letter page arrives near 2550 × 3300 px and A4 near 2481 × 3507 px, so "Image resolution" is usually worth setting rather than leaving on "Keep original".

Frequently Asked Questions

Is HEIF the same thing as HEIC?

Not exactly. HEIF is the container standard; HEIC is the everyday name for HEIF files carrying HEVC-coded images, which is what Apple devices write. The extensions are frequently used interchangeably, and some applications accept one spelling but not the other. ODG to HEIC covers the same conversion under that name if a destination insists on it.

Should a diagram be a HEIF at all?

Usually not. HEVC-based coding is tuned for photographic content, and the flat fills and crisp strokes of a diagram are what it handles least well — you get haloing along edges and softened small text, for a file that many applications still cannot open. Choose HEIF when something downstream requires it, and ODG to PNG or lossless WebP otherwise.

Does transparency survive the conversion?

The container supports an alpha channel and the render stage does not flatten it, so transparency can survive in principle. Two things decide whether it does in practice: whether the Draw page actually has a transparent background — check Page ▸ Page Properties ▸ Background, since a page with a fill set renders opaque — and whether the receiving application reads HEIF alpha, which is inconsistent outside Apple's ecosystem. When a transparent background genuinely matters, PNG remains the dependable choice.

Can a HEIF hold every page of a multi-page drawing?

HEIF supports image collections, but a collection is not a paginated document and this route does not produce one. Each page becomes its own .heif, numbered in page order and delivered together. For all the pages in a single openable file, ODG to PDF is the format designed for it.

Will text in the drawing stay searchable?

No. Rasterising converts type to pixels on every raster route, so nothing in the output is selectable or searchable. Keep the original .odg as your editable master, and use ODG to PDF or ODG to SVG when live text is needed.

Which quality rung suits a drawing with small labels?

Very High or Highest. Lower rungs smooth exactly the high-contrast boundaries that keep small type legible, and the detail cannot be recovered afterwards. If the file is still too large, reduce "Image resolution" instead — downscaling a diagram degrades it far more gracefully than aggressive quantisation does.

What will open a .heif file on a machine that is not a Mac?

Less than you would hope. Apple platforms handle it natively; Windows needs Microsoft's HEIF and HEVC extensions installed; Android support varies by version and manufacturer; and browsers largely do not display HEIF. That patchiness — a consequence of HEVC's patent licensing — is the main practical argument against choosing it for anything you intend to share widely.

Does the HEIF carry the drawing's metadata?

Not usefully. The container is designed to hold Exif and XMP alongside the image, but the document properties an ODG stores — author, title, keywords, the object model — are not mapped into them by this conversion. Keep the .odg as the record of the drawing itself.

How are my uploaded files handled?

They travel over an encrypted connection, are processed on our servers, and are deleted automatically a few hours later along with any output produced. Nothing is shared, published or reused, no account is required, and no watermark is applied. The ODG converter hub indexes every other target for this source.