Compare TOML
Compare two TOML files online, ideal for Cargo.toml and pyproject.toml. Sections match by name, so reordering never shows as a change. Free, with no upload.
Files never leave your browser.
About TOML Diff
Parses both TOML files and compares the underlying tables and values. Section ordering and whitespace don't matter. Only structural differences appear in the result.
How to use
- Paste or load your two TOML files.
- Section headers are matched by name; key/value pairs are compared inside each section.
- Adjust array-mode options if order-sensitive arrays matter for your comparison.
Try a sample
A Cargo.toml with version bumps and a new dependency.
What this tool doesn't handle
- Comments and original table ordering are not preserved; the comparison is purely value-based.
- Inline-table syntax is normalized before comparison.
Frequently asked questions
Do my files ever leave my browser?
No. Every comparison runs locally in your browser. Nothing you paste, drop, or load is uploaded to a server; the tool keeps working even if you go offline after the page loads.
Is this tool free to use?
Yes. All DiffResolver tools are free, with no account, sign-up, or installation. Because processing happens on your device, there are no server-imposed usage limits.
Does the order of sections in a TOML file matter?
No. Tables are matched by name, so reordering sections produces no differences. Only changed keys and values inside each table are reported.
Can I compare Cargo.toml or pyproject.toml files?
Yes, dependency manifests are the typical case. Version bumps, added dependencies, and changed feature flags show up as key-level changes inside their sections.
Is there a file size limit?
No server limit applies, because nothing is uploaded. The memory of your device sets the practical limit. Above 10 MB for text, 40 MB for images, 100 MB for documents, or 500 MB for archives, the tool warns you that the work can be slow, but it never blocks the file.
Does this tool work offline?
Yes. The browser keeps a copy of the tool after the first visit, so a page you opened before still works without a network. You can also install DiffResolver as an app from the browser menu. Installation stays optional; the site works the same in a normal tab.
Where is my data stored?
Your files are stored nowhere. They stay in the memory of the page and are gone when you close the tab. Only what you save yourself stays in this browser: a snapshot, your tool options, and your theme. To remove it, open Settings and select Clear all local data.