Merge Multiple TOML Files

Combine configurations from several TOML files into one. This merge tool lets you resolve conflicts and choose how to handle duplicate keys, creating a unified config.

Merge Multiple TOML Files

Combine configurations from two TOML files with conflict resolution options.

Base TOML

TOML to Merge

Conflict Strategy:

How the TOML Merge Tool Works

This tool combines two TOML files into one, handling conflicts with your chosen strategy. Deep merge combines nested structures, while conflict resolution determines what happens when the same key exists in both files.

Merge Process

Paste the base TOML in the first input area
Paste the TOML to merge in the second input area
Select a conflict strategy: overwrite, skip, or rename
Click "Merge TOML" to combine
Both files are parsed and validated
Structures are deep-merged recursively
Conflicts are resolved using your chosen strategy
Copy or download the merged result

Specific Use Cases

Environment Configuration

Merge base config with environment-specific overrides. Base has defaults, environment file overrides specific values.

Multi-Project Configuration

Combine shared config with project-specific settings. Avoid duplicating common configuration across projects.

Plugin System Configuration

Merge core app config with plugin configurations. Each plugin adds its own settings to the base.

Configuration Inheritance

Implement config inheritance by merging parent and child configs. Child overrides specific values while inheriting the rest.

Template Customization

Start with a template config and merge user customizations. Users only specify what they want to change.

What to Know Before Using This Tool

Understanding merge strategies:

Overwrite: second file's values replace first file's
Skip: first file's values are kept, second's ignored
Rename: conflicting keys from second file get suffix (_2, _3)
Nested objects are merged recursively
Arrays from second file replace arrays from first
Keys only in one file are always included

Frequently Asked Questions

What does overwrite strategy do?

When the same key exists in both files, the second file's value wins. This is useful for override configurations.

When should I use skip strategy?

Skip keeps the base file's values and ignores conflicts. Use when the base config should take precedence.

How does rename strategy work?

Conflicting keys from the second file get a suffix (_2, _3, etc.). This preserves all values without data loss.

Are nested structures merged?

Yes, nested objects are deep-merged. Only leaf values are subject to conflict resolution.

Can I merge more than two files?

Merge files pairwise. Merge A and B, then merge the result with C. The order affects the final result with overwrite strategy.

What happens to arrays?

Arrays are replaced, not merged. The second file's array replaces the first file's array for the same key.

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Merge Multiple TOML Files