Best Image Format for Email Signatures — Size, Format & Tips

Your email signature is seen by every person you email — clients, colleagues, and prospects. A poorly optimized signature image can make emails slow to load, look unprofessional, or trigger spam filters.

Email Signature Image Specs\n\n- **Logo**: 100-200px wide, PNG with transparent background\n- **Headshot**: 80-100px, JPG at 80% quality\n- **Total signature image weight**: Under 50KB\n- **Format**: PNG for logos (supports transparency), JPG for photos

Step 1: Resize Your Logo\n\nYour logo should be small — 100-200px wide. Full-size logos in email signatures are distracting and look unprofessional.\n\nGo to pixelforgeai.club/tools/resize to set the exact dimensions.

Step 2: Remove Background (for logos)\n\nIf your logo has a white or colored background, remove it for a cleaner look. A transparent background ensures your logo looks good regardless of the email client's background.\n\nGo to pixelforgeai.club/tools/remove-bg

Step 3: Compress\n\nEmail signatures should be lightweight. Compress your logo to 80% quality and your headshot to 75%. The total image weight for your entire signature should be under 50KB.\n\nGo to pixelforgeai.club/tools/compress

Common Mistakes\n\n- Logo too large (dominates the signature)\n- Using BMP or TIFF (not web-compatible)\n- Exceeding 100KB total for signature images\n- Not removing white background from logo