Swap JSON Keys with Values
Exchange keys with values throughout a JSON file. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Swap JSON Keys with Values
- 1. Paste your JSON object. Put a flat JSON object of key-value pairs into the input pane. Each existing key becomes a value and each existing value becomes the new key in the output.
- 2. Choose an indent. Pick 2 spaces, 4 spaces or tabs for the inverted object. This only affects formatting, not which pairs get swapped, so choose whatever matches your project's style.
- 3. Copy the inverted object. Copy the swapped result and paste it wherever you need to look up the original keys by their values instead, such as a reverse lookup table in your code.
When to use Swap JSON Keys with Values
Swap JSON Keys with Values is for turning a forward lookup object into a reverse one. Any time you have a JSON map from names to codes, or codes to labels, and need to search it in the other direction, this exchanges every pair for you.
- Building a reverse enum lookup. An app has a JSON map from status codes to human-readable labels, but a new feature needs to go from label back to code. Swap the object instead of writing a second map by hand.
- Inverting a locale ID table. A localization system maps locale codes to display names, and a form needs the opposite direction to convert a user's selected language name back into a code.
- Creating a reverse index. A JSON object maps usernames to user IDs for one part of a system, but another part needs to find the username given only the ID. Swapping produces that index instantly.
- Flipping a role assignment file. A JSON file maps roles like admin and editor to the person holding them, and you need a quick way to look up which role a given person currently holds.
Examples
Invert a lookup object
Input
{"admin": "alice", "editor": "bob"}Output
{
"alice": "admin",
"bob": "editor"
}About the Swap JSON Keys with Values tool
Swap JSON Keys with Values does its work locally, right in the browser. Exchange keys with values throughout a JSON file. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the JSON Tools collection on EditSafely, a set of 90 small, focused JSON utilities that share the same instant, private workspace.
You can shape the output with the Indent setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Is Swap JSON Keys with Values free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.