Why are my brand fonts substituted with default fonts?

PPTX is the default PowerPoint format since PowerPoint 2007, built on Office Open XML and used wherever slides are made - PowerPoint 365, Keynote, Google Slides (on export), LibreOffice Impress. Sales engineers presenting pitch decks, conference speakers, university lecturers, and product managers building roadmap reviews all create PPTX files daily. Converting PPTX to HEIC renders each slide as a flat image in Apple's native photo format - ideal for flipping through a deck in the iPhone Photos app, AirDropping slides to a colleague, or archiving every version of a deck as dated, searchable images in iCloud at half the storage cost of JPG.

Slide-to-image conversion is the most predictable office rendering workflow because slides are already paginated by design - one slide becomes one HEIC, in slide order. Speaker notes, hidden slides, and section dividers are excluded unless explicitly included. Animations, transitions, and embedded video render as a static end-state frame (motion cannot be captured in a still image). Embedded charts, SmartArt, and shapes all render as their visual state at last save. If your deck uses real-time linked data (a chart pulling from an Excel sheet), the HEIC captures whatever was last saved into the PPTX, not a fresh fetch.

PPTX files run 200KB-200MB. A minimal text-only 10-slider is usually under 500KB; a 60-slide investor deck with embedded high-res photography can exceed 100MB. HEIC output typically runs 100KB-1MB per slide - roughly half of equivalent JPG - with 16:9 decks rendering at 1920x1080 or higher depending on DPI. One planning note: social platforms like LinkedIn don't accept HEIC uploads for carousels, so for that use case convert the slides onward via HEIC to JPG. For legacy PowerPoint, see our PPT to HEIC tool. For macro-enabled decks, use PPTM to HEIC.

Reasons to convert PPTX 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 PPTX 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 PPTX → HEIC tool on heic.now.
2. Drag your PPTX 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.

• Embed all fonts in PowerPoint before exporting (File - Options - Save - Embed fonts in the file) so brand typography renders correctly rather than falling back to system substitutes.
• Animations only render as the final state - if your slide reveals bullets one at a time, the image shows all bullets visible. Design with this end-state in mind.
• Hidden slides are skipped by default - useful for excluding backup slides, appendix content, or speaker-only notes that should not be in the export.
• HEIC slide images AirDrop and iMessage beautifully, but social platforms and most CMSes reject them - keep a JPG derivative pass in the workflow for publishing.
• For photo-heavy slides, HEIC's HEVC compression shines - expect roughly half the file size of JPG export at the same visual quality.