Borderlands 4 - Online Save Editor

Web-based tool for modifying Borderlands 4 (PC) save files.

Online Editor

Features

• Decrypt .sav file to human-readable YAML
• Export as re-encrypted .sav file or YAML
• Manually edit save YAML within the web page
• Apply preset modifications
  • Remove map fog
  • Discover all locations
  • Unlock all safehouses
  • Unlock all collectibles
  • Complete all challenges
  • Unlock all achievements
  • Skip story missions
  • Skip all missions
  • Change class
  • Max level (50)
  • Max SDU
  • Unlock all vault powers
  • Unlock all hover drives
  • Unlock all specializations
  • Unlock UVHM
  • Set all items to character level (or max level for bank items)
  • Unlock new game shortcuts - profile.sav
  • Unlock all cosmetics - profile.sav

I don't plan to implement item editing beyond basic preset manipulations.

Usage

1. Open the online editor linked above or clone the repo and open index.html in any web browser.
2. Select a .sav file (or .yaml) if you have one.
3. Enter your Steam or Epic ID - whichever one you license the game through.
   • These can be found on each platform's account setting website, or in the save file path for Steam.
   • Steam: https://store.steampowered.com/account/ (17 characters)
   • Epic: https://www.epicgames.com/account/personal/ (32 characters)
4. Click Import - This will decrypt the save and place the YAML text in the integrated editor.
5. Export your original save as a backup. Keep these timestamped files in case something goes wrong.
6. Edit your save as desired - refer to docs for basic info about the structure
   • Apply presets to automatically make common changes that are relatively safe & reliable. These are applied in the editor immediately when clicked. No undo button for now.
7. Download as .sav
8. Rename or delete your original save and replace it with the new one, removing the timestamp.
   • Recommended to keep a copy of the new save with the timestamp as a backup (in addition to the pre-edit backup).

Notes:

• Consider disabling cloud backups for the game to prevent save files from being reverted in some situations.
• You can safely replace saves while the game is running as long as a different character is selected.
• Modifying a save for a loaded character wont work as the save is in memory at that point and will overwrite the file on disk.
• Don't attempt to modify profile.sav while the game is running for the above reason.

Preset Details

These run JavaScript functions which apply pre-configured edits to save files quickly and consistently.

• You can apply as many presets as you want.
• They update the YAML text you see in the editor.
• They're intended to be modular, so you may need to run a few to get the desired effect.
  • Example: "Unlock all collectibles" will technically just "collect" them. You'd also need to apply "Discover all locations" to have them shown on your map.

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World

• Remove map fog
  • Fully reveals the in-game map terrain by setting fog of war overlay for every map to 100% discovered. Technical details
  • Does not add PoI markers. See "Discover all locations".
• Discover all locations
  • Reveals all point of interest (PoI) markers on your map.
• Unlock all safehouses
  • Unlocks fast travel to all safehouses and silos by completing related mission (activities).
  • Re-calculates SDU points, applying the new total if it's higher.
  • Unlocks safehouse, silo, and town PoI markers.
• Unlock all collectibles
  • Marks all* collectibles as found. ECHO logs, capsules, etc. (bobble heads aren't included)
  • Re-calculates SDU points, applying the new total if it's higher.
  • Does not add PoI markers. See "Discover all locations".
• Complete all challenges
  • Completes all counter-based challenges.
  • Does not complete activities or collectibles challenges. See "Skip all missions" and "Unlock all collectibles".
  • Does not grant rewards for completion. More info
  • Unlocks some achievements. (UVH 5 & world events confirmed)
• Complete all achievements
  • Also completes all activities.
  • Triggers platform achievements (Steam/Epic).
• Skip story missions
  • Completes all missions related to the main story. Doesn't modify any other missions.
  • Functionally equivalent to starting a new save with the in-game story skip option. (Does not unlock that option)
  • Enables the specialization system.
• Skip all missions
  • Completes all missions including the main story, vaults, and activities like drill sites.
  • Enables the specialization system.
  • Re-calculates SDU points, applying the new total if it's higher.

Character

• Change class
  • Changes the character class.
  • Refunds skill points.
• Max level (50)
  • Sets character level to the maximum.
  • Sets expected skill points & XP.
• Max SDU
  • Purchases all SDU upgrades, adding points if necessary.
• Unlock all vault powers
  • Unlocks all vault poweres normally granted by completing vaults.
  • Included in "Unlock all collectibles".
• Unlock all hover drives
  • Unlocks all hover drive tiers and manufacturers.
  • Does not complete the associated kill count challenges. See "Complete all challenges".
• Unlock all specializations
  • Unlocks the specialization system. More info
  • Sets maximum level and fully completes all trees.
• Unlock UVHM (Ultimate Vault Hunter Mode, i.e. post-game)
  • Sets values in the save to unlock UVH rank 1-5. You can switch between them in-game.
  • Doesn't complete any missions, so you could theoretically play the story from level 1 in UVHM difficulty which isn't otherwise possible.
  • Loading a save with this & story completion will enable starting at level 30 (flag is automatically added to profile.sav).
  • Completes all UVH challenges.

Misc

• Apply all presets
  • Applies all character presets - does not include the below "profile" presets which use a different save file.
  • Grants maximum money & eridium.
• Set all backpack items to character level
  • Updates all item serials in character inventory to match the level of the character.
• Set all bank items to max level profile.sav
  • Updates all item serials in bank to have max level (50).
• Unlock new game shortcuts profile.sav
  • Enables starting new characters at level 30 with story already complete.
  • Enables the specialization system.
• Unlock all cosmetics profile.sav
  • Unlocks all cosmetic items, making them available to all characters.

Where Are My Saves?

Windows:

• Navigate to %USERPROFILE%\Documents\My Games\Borderlands 4\Saved\SaveGames\
  • Steam version will have a sub-folder with a 17-digit name - this is your steam ID which you'll need to encrypt/decrypt save files.
  • Navigate deeper like .\<steam_id>\Profiles\client\
• 1.sav, 2.sav, etc. files represent characters (import these with the editor)
• profile.sav contains global state such as black market inventory and bank contents. (the editor also works with this file)

Contributing

Please feel free to submit a pull request!

Please reach out on Discord if you'd like to discuss this project! (link in profile)

Acknowledgements

• Decryption functionality largely based on https://github.com/glacierpiece/borderlands-4-save-utility
• Epic ID key derivation based on https://github.com/mi5hmash/Borderlands4SaveDataResigner
• Examples of 100% saves from Bytelocker (Nexus Mods page)
• RegularLunar for various features and enhancements.
• Item serial research via Nicnl & co.
• This project was made possible through much coaching by LLM tools. I'm an amateur programmer.