Borderlands 4 Save Editor

bl4_save_editor (Epic and Steam) find out a bit more: Github

A  save editor for BL4. Export saves to YAML, edit values, and write them back safely. Exe has been released, please test it out (v1. 04a).

🔑 Core Save Handling

• []Profile Decryption/Encryption

[]Supports decrypting and re-encrypting .sav files from Borderlands 4 (Epic/Steam).

[]Automatic backup system when saving edits.

[]Character Management

• []Read and modifies player character information.

  []Handle equipped/unequipped items, SDU references, and flags tied to loadouts.

• []Items

  []Parses, displays, and edits weapons, shields, grenades, relics, class mods.

  []Can decode item serials (including advanced Maliwan shotgun, Maliwan weapon

  traits). []Preserves unknown/unused fields so items don’t get corrupted.

• []Reads available skins, heads, and Echo themes.

• []Story / Mission Flags

  []Tracks progression flags (main story, side quests).

  []Preserves whether a mission is complete or in-progress.

• []_unlock_all_map_areas() helper: sets all maps/areas/locations to discovered.

  []Ensures minimal “ALL” entry exists for users who want quick unlock.

• []Unlockable categories (though some profiles log as empty).

  []Cosmetic unlocks tied to global profile rather than per-character.

• []Save Integrity

  []Best-effort preservation of unknown values (so experimental flags aren’t lost).

  []Backup with timestamp naming (.bak).

• []Better handling of name markers (sometimes show as “equipment”).

  []Full integration of skin/attachment mining for Echo4.

  []Single-file consolidated editor (all helpers inline, no external dependencies).

  []Expansion of cosmetic unlocks beyond defaults.

  Important references:

  https://github.com/glacierpiece/borderlands-4-save-utility - Used some keys and gun decoder references.

  Awzam - Weapon serialization references.