PPTM to HEIF Converter

Convert PPTM slides to HEIF high-efficiency images online free

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Next-Gen Compression

HEIF represents the cutting edge of image compression — your PPTM slides are encoded with far greater efficiency than legacy JPEG or PNG formats.

10-bit Color Depth

HEIF supports up to 10 bits per channel, capturing richer gradients and more accurate colors from your presentation slides than 8-bit formats allow.

Online Conversion

No desktop software needed. Upload your PPTM in any modern browser, and Convertio delivers HEIF output ready for download in minutes.

How to convert PPTM to HEIF

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose heif or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your heif file right afterwards

About formats

PPTM is a macro-enabled presentation format for Microsoft PowerPoint, introduced with Office 2007 as part of the Office Open XML family. Structurally identical to PPTX — a ZIP archive containing XML parts for slides, layouts, themes, and media — PPTM adds the ability to store and execute VBA (Visual Basic for Applications) macro code within the presentation. The deliberate separation of macro-enabled (.pptm) and macro-free (.pptx) extensions was a security design decision: users and administrators can identify macro-containing files by extension alone, and security policies can block or warn about macro-enabled formats while freely allowing standard PPTX files. PPTM files store VBA projects in a dedicated binary stream (vbaProject.bin) within the ZIP package, alongside the same XML slide content used by PPTX. Macros in PowerPoint presentations power automated slide generation, custom ribbon interfaces, interactive quizzes, data-driven content updates, and integration with external data sources. One advantage is workflow automation — PPTM enables repeatable processes like generating monthly report decks from database queries or updating financial charts across dozens of slides with a single button click. The format preserves full compatibility with the OOXML specification, meaning all standard PowerPoint features — transitions, animations, embedded media, SmartArt — work identically to PPTX. PPTM is supported by Microsoft PowerPoint on Windows and macOS, with macro execution limited to the desktop application.
Developer: Microsoft
Initial release: January 30, 2007
HEIF (High Efficiency Image File Format) is a container format for images and image sequences standardized by the Moving Picture Experts Group as ISO/IEC 23008-12, first published in 2015. HEIF is built on the ISO Base Media File Format (ISOBMFF, the same container used for MP4 video), providing a flexible structure that can hold single images, image collections, image sequences (like animations or bursts), and derived images with non-destructive editing operations. The container is codec-agnostic — while the most common implementation pairs HEIF with HEVC/H.265 compression (branded as HEIC by Apple), the standard also accommodates AV1 compression (creating the AVIF variant), H.266/VVC, and other future codecs. HEIF supports features that JPEG lacks: 10-bit and 12-bit color depth, wide color gamuts (Display P3, BT.2020), lossless compression, alpha transparency, depth maps, thumbnail images, and Exif/XMP metadata — all within a single file. Auxiliary image items can store computational photography data like depth maps, HDR gain maps, and semantic segmentation masks. One advantage is the format's future-proof architecture: by separating the container from the codec, HEIF can adopt newer, more efficient compression technologies without changing the file structure, metadata handling, or application-level APIs. The substantial compression improvement over JPEG is another core strength — HEVC-based HEIF typically achieves 40-50% file size reduction compared to JPEG at the same visual quality, beneficial for storage and bandwidth. HEIF is supported by Apple's ecosystem (iOS, macOS), Windows 10/11, Android 10+, GIMP, ImageMagick, and Adobe products.
Initial release: 2015

Frequently Asked Questions

Why convert PPTM to HEIF?

HEIF is the successor to JPEG — it stores images at significantly better quality-to-size ratios. Slides converted to HEIF look sharper while consuming less storage.

What is the difference between HEIF and HEIC?

HEIF is the container format; HEIC specifies HEVC as the codec. In practice, most applications treat them identically — both deliver high-efficiency image storage.

Does HEIF support image sequences?

Yes — HEIF can bundle multiple images, making it possible to store an entire set of converted slides in a single container file.

What happens to macros?

HEIF is purely an image container. All VBA macros and executable content from the PPTM file are eliminated during the rendering and encoding process.

Which platforms support HEIF?

Apple devices (iOS 11+, macOS High Sierra+), Android 9+, and Windows 10/11 with HEIF codecs all display HEIF images without third-party tools.

Is PPTM to HEIF free?

Yes — Convertio converts PPTM to HEIF at no cost. Paid plans offer batch conversion and priority processing for power users.