Cisco Config Diff Tool
Upload or paste two Cisco IOS or NX-OS configuration files and instantly see what changed, with a generated migration script you can run directly on your device. Supports IOS, IOS-XE, and NX-OS. Free, no account needed.
Open the Config DiffWhat it does
- Hierarchical config comparison (section-aware, not just line-by-line)
- Auto-generated IOS migration script from the diff
- Visual added, removed, and modified highlighting
- Works with IOS, IOS-XE, and NX-OS configs
- No file size limits, paste or upload
Frequently asked
What config formats does the diff support?
Cisco IOS, IOS-XE, and NX-OS. Paste both configs or upload the files, running config or startup config.
Does it produce a migration script?
Yes. Along with the visual diff you get an IOS style migration script, with the lines to add and the lines to negate, so you can move a device from the old config to the new one.
Do I need an account?
No. The config diff is free and needs no login.