PPTX to BMP Converter

Convert PPTX slides to BMP images — free online

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Uncompressed Fidelity

PPTX slides render to BMP with zero compression — every color, gradient, and detail is captured in raw bitmap form without any loss.

Multi-Slide Output

Each slide in your PPTX becomes an individual BMP image. Process entire presentations in one go and download all slides at once.

Files Stay Private

Uploaded PPTX presentations are deleted immediately after processing. BMP output is removed from servers within 24 hours.

How to convert PPTX to BMP

1

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

2

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

3

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

About formats

PPTX is the default file format for Microsoft PowerPoint presentations since Office 2007, based on the Office Open XML (OOXML) standard published as ECMA-376 and later adopted as ISO/IEC 29500. A PPTX file is a ZIP archive containing XML documents that describe slide content, layouts, themes, relationships, and metadata in a structured, human-inspectable hierarchy. Each slide, slide layout, and slide master is stored as a separate XML part, with media assets (images, audio, video) and embedded objects kept in dedicated directories within the package. The XML foundation enables programmatic creation and manipulation of presentations using standard XML tools and libraries — developers can generate, modify, or extract content from PPTX files without requiring PowerPoint itself. One significant advantage is openness and interoperability: the fully documented OOXML specification allows any software to read and write PPTX files, and the format is supported by LibreOffice Impress, Google Slides, Apple Keynote, and numerous other tools. Built-in ZIP compression is another practical strength — PPTX files are typically 50-75% smaller than equivalent PPT files, reducing storage and transfer costs. The format supports all modern PowerPoint features including SmartArt, 3D models, morph transitions, embedded fonts, accessibility metadata, and co-authoring capabilities. PPTX has become the standard interchange format for presentation content worldwide.
Developer: Microsoft
Initial release: January 30, 2007
BMP (Bitmap) is a raster image file format developed by Microsoft for the Windows operating system, introduced with Windows 3.0 in 1990. The format stores pixel data in a straightforward structure: a file header specifying dimensions, color depth, and compression method, followed by an optional color palette and then the raw pixel array. BMP supports color depths from 1-bit monochrome through 4-bit and 8-bit indexed color to 16-bit, 24-bit true color, and 32-bit with alpha channel. Most BMP files store pixels uncompressed (BI_RGB), though optional RLE compression is available for 4-bit and 8-bit modes. Pixels are arranged in bottom-up row order by default, with each row padded to a 4-byte boundary. One advantage is absolute simplicity — the format has no complex encoding, filtering, or compression layers, making BMP files trivial to read and write programmatically in any language. This simplicity also means BMP images render with zero decoding overhead, useful in scenarios where decompression latency matters. The format's deep Windows integration is another strength: BMP is the native bitmap format for Windows GDI, clipboard operations, and device-independent bitmap (DIB) handling, ensuring first-class support across the entire Windows ecosystem. While BMP's lack of compression produces large files unsuitable for web use or storage-constrained environments, it remains widely used as an intermediate format in image processing, as a clipboard exchange format, and in embedded systems where decoding simplicity outweighs file size.
Developer: Microsoft
Initial release: 1990

Frequently Asked Questions

Why convert PPTX to BMP?

BMP preserves every pixel without compression artifacts. Choose it when you need raw, uncompressed slide captures for editing or print work.

How do I open BMP files?

Windows Photo Viewer, macOS Preview, Paint, GIMP, and Adobe Photoshop all handle BMP natively — it opens on virtually any system.

Are BMP files large?

Yes — BMP stores uncompressed pixel data, so files are significantly larger than PNG or JPG. This makes them ideal for archival but less suited for web use.

Does BMP support transparency?

Standard BMP does not support transparency. If your slides have transparent backgrounds, those areas will render as a solid color in BMP.

Is this tool free to use?

Convertio offers free PPTX to BMP conversion. Premium plans unlock higher resolution limits and batch processing for larger projects.

BMP or PNG — which keeps more quality?

Both are lossless. BMP stores raw uncompressed data while PNG uses lossless compression for smaller files. Quality is identical in both.

PPTX to BMP Quality Rating

4.6 (592 votes)
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