What file formats do you support?

We support over 100 file formats including images (JPG, PNG, GIF, WebP, TIFF), documents (PDF, DOC, DOCX, TXT), videos (MP4, AVI, MOV), audio (MP3, WAV, FLAC), and many more specialized formats.

Yes, absolutely. We use enterprise-grade encryption for all file transfers. Your files are automatically deleted from our servers after conversion, and we never store or access your personal data.

What is the maximum file size?

The maximum file size for free users is 100MB per file. Premium users can convert files up to 1GB. For larger files, we recommend our batch processing feature.

How long does conversion take?

Most files convert in under 30 seconds. The exact time depends on file size and format complexity. Our advanced algorithms ensure the fastest possible conversion while maintaining quality.

Can I convert multiple files at once?

Yes! Our batch processing feature allows you to upload and convert up to 50 files simultaneously. This is perfect for bulk conversions and saves significant time.

Do I need to create an account?

No account is required for basic conversions. However, creating a free account gives you access to batch processing, file history, and priority support.

BMP to SUN

Drag, drop, and convert your files with ease.

1. Add Your Files

Drag & drop or paste files here

BMP (Max. 10MB) • Up to 5 files in guest mode

Choose Files

Or upload from:

Temporary file processingFiles are uploaded for processing and are not retained as permanent storage. Read our File Processing & Retention Policy.

2. Conversion Settings

Convert From

Convert To

Image options

Width (px)

Height (px)

Strip image metadata (EXIF, etc.)

Advanced Options

Quality

Instant download after conversion

Why Choose Our Converter?

Reliable BMP to SUN conversions for archival compatibility and legacy application support across platforms

Legacy Compatibility

Convert BMP files to SUN format for older Unix tools and archival systems requiring SUN raster images.

Fast Local Processing

Browser-based conversion avoids uploads and completes typical BMP→SUN jobs in seconds for small batches.

Pixel-Exact Rasterization

We rasterize BMP pixels directly into SUN raster rows to preserve visible image content without recompression artifacts.

Client-Side Privacy

All conversions run in your browser memory; no files are transmitted to external servers by default.

Simple Options

Choose bit-depth mapping and row-order orientation to match legacy SUN viewers and imaging pipelines.

Archival Export Ready

Produce SUN files sized for archival use with predictable header fields and uncompressed raster data.

Frequently Asked Questions

Find answers to common questions about our file conversion service

Still have questions?

Can't find the answer you're looking for? Our support team is here to help.

Performance Estimates

Estimated conversion times based on typical hardware.

Conversion Speed Benchmarks

1-3 seconds

12 MP image processing

12 MP, 4000x3000

Fast

3-6 seconds

24 MP image processing

24 MP, 6000x4000

Moderate

8-15 seconds

48 MP image processing

48 MP, 8000x6000

Slow

Batch Conversion Estimates

Batch Size	Total Time	Avg per Image	Efficiency
10 images (12 MP each)	20-40 seconds	2-4 seconds	High
50 images (12 MP each)	1.5-3 minutes	1.8-3.6 seconds	High
100 images (12 MP each)	3-6 minutes	1.8-3.6 seconds	Moderate
200 images (12 MP each)	6-12 minutes	1.8-3.6 seconds	Moderate

Browser Compatibility

Format support across all major browsers

Support Across Browsers

Chrome

Supported

Full Support

Firefox

Supported

Full Support

Safari

Supported

Full Support

Edge

Supported

Full Support

Advanced Format Features Support

Features	Chrome	Firefox	Safari	Edge
Alpha Channel
ICC Profiles
EXIF Metadata
16-bit Depth

Device Compatibility

Seamless conversion across desktop, mobile and tablet

Desktop

Fast multi-core processing
Batch upload support

Mobile

Responsive mobile browser workflow
Instant photo conversion

Tablet

Full tablet browser support
Touch-friendly interface

Source vs Target Format

Key technical differences between formats

Feature	Source Format	Target Format
Compression	High efficiency	Uncompressed
File Size	Small	Large
Quality	High (compressed)	Lossless
Transparency	Supported	Supported
Metadata	EXIF, ICC	EXIF, ICC
Primary Use	Web delivery	Editing & print

How to Convert Files

Follow these simple steps to convert your files

Upload Source File

Select or drag and drop your BMP source files.

Adjust Settings

Set target depth (8/24/32-bit) and choose background for alpha flattening.

Convert

Click convert; image pixels are remapped into SUN scanlines in the browser.

Download Result

Save your SUN file or ZIP batch; test with target legacy viewer.

Ready to Convert Your Files?

Use our high-speed converter to process your images now.

Start Converting Now

Tips and Best Practices

Optimize your conversion workflow with technical recommendations.

Prepare BMP Source Structure

Flatten BMP layers in your editor so the composite matches expected SUN output
Convert BMP palette images to full RGB if target viewers lack palette support
Decode any BMP RLE compression before export to ensure correct raster rows
Verify BMP header bit masks (BITFIELDS) and map them to SUN channel order
Remove editor-specific metadata blocks that SUN will not recognize

Target Encoding and Size

Choose 24-bit SUN output for wide viewer support, accepting larger file sizes
For archival storage, keep original BMP plus SUN copy to maintain provenance
Enable SUN RLE only if your legacy pipeline explicitly supports that variant
When expanding 8-bit BMP palettes to 24-bit SUN, expect 3x size increase
Set consistent row-order and byte-order to match downstream ingestion

Platform and Software Workflow

Test produced SUN files with ImageMagick's identify to validate header fields
Use NetPBM tools (ras2pnm/pnmtorast) to inspect compatibility with printers
On Solaris or legacy Linux, open SUN files with xv to confirm rendering
If target software expects big-endian, ensure byte-order conversion during export
Document the chosen depth and endianness for future pipeline users

Verify Output Integrity

Compare pixel checksums between BMP source and SUN output to verify data copy
Confirm alpha flattening result visually where BMP used transparency
Check color appearance against source to detect missing ICC application
Validate that multi-frame BMPs were intentionally flattened and archived
Store samples of converted files and associated settings for reproducibility

Fast Processing

Close unused tabs for maximum throughput.

Client-Side Privacy

No media leaves your device.

Broad Compatibility

Output files work across all operating systems.

Pro Tip

For batch conversions, process in groups of 20-50 files to optimize memory usage and avoid browser slowdowns.

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