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How to edit a Kerbal Space Program save

Edit selected persistent.sfs values safely using careful text-based editing and keep the original save untouched.

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Guide content

Overview

Steps

  1. Back up persistent.sfs.
  2. Open it in the KSP editor.
  3. Change supported values only.
  4. Export and test in a copied save slot.

Warnings

  • Do not bulk edit craft or orbit sections without understanding the file structure.
  • Keep a clean original save outside the editor flow.

Helpful reminders

Always back up saves

Keep the original file untouched until the edited version has been verified in-game.

  • Create a backup before editing.
  • Test the edited file first.
  • Keep both original and edited exports.

Before you edit

KSP persistent.sfs files are readable text, but broad edits can still break references. Stay inside the supported fields first.

Related games

Kerbal Space ProgramEdit selected mission and persistence values from human-readable persistent.sfs saves using a structured text adapter.
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Always keep the original save file untouched until the edited file has been tested successfully.