Introduction
MailLighter is a lightweight, free, and open-source Outlook add-in that helps you clean up emails before forwarding or replying. It removes unnecessary clutter such as images, attachments, and long reply chains; keeping your messages lighter, cleaner, and more professional.
Why MailLighter?
Every day, emails accumulate inline images (especially signatures), heavy attachments, and endless reply chains. When you forward or reply, all that unnecessary content is sent to every recipient. The result? massive bandwidth usage, cluttered inboxes, and significant energy and raw materials consumed to store that data.
MailLighter solves this with 5 targeted features accessible from Outlook’s ribbon menu:
Remove images : Strip all inline images from the email body
Remove attachments : Delete all file attachments
Keep 2 replies : Trim the conversation to the last 2 replies only
Keep selection only : Keep only the text you’ve selected, remove everything else
Full cleanup : Apply all of the above in a single action
Key Benefits
- Fast : Cleans emails in under a second
- Private : 100% local processing, no external servers
- Free : No subscription, no premium tier, no hidden costs
- Multilingual : Available in English, French, and Spanish
- Non-destructive : Works on the draft, your original email is preserved
- Open-source : Full source code available on GitHub
Getting Started
Ready to start? Head to the Installation guide to set up MailLighter in Outlook.