Compress BMP Images for Reddit
Reddit image posts display in feed thumbnails and full-size previews. Optimized images load faster and look sharper across Reddit's desktop site, mobile app, and old.reddit. Uncompressed Windows bitmap format with very large file sizes. Not suitable for web use without compression. Use ImageSmith to compress your BMP images to the ideal file size for Reddit — target under 20,000KB for optimal performance. Processing is fully browser-based — no server uploads.
Recommended format
JPEG
Max file size
20,000KB
Dimensions
1200×628 (link previews), 1080×1080 (image posts)
✓Reddit thumbnails display at 140×140 — ensure key content is centered
✓Use 1200×628 for link preview images
✓PNG for screenshots and graphics, JPEG for photographs
✓Reddit GIFs auto-convert to MP4 for better performance
Compress BMP for Other Platforms
Compress BMP for Reddit — FAQ
Reddit works best with images under 20,000KB. Recommended dimensions: 1200×628 (link previews), 1080×1080 (image posts). ImageSmith can compress BMP images to any target size in seconds.
Reddit primarily supports JPEG, PNG, GIF. Converting to JPEG is recommended for best compatibility.
Upload your BMP image to ImageSmith, set a target size under 20,000KB, and compress. Reddit thumbnails display at 140×140 — ensure key content is centered
Reddit supports image uploads up to 20MB. For best performance, keep image posts under 5MB. Use 1200×628 pixels for link share images to fill the preview card.