Free browser-based data tool

JSON Value Replacer

Replace JSON values safely across your document.

Your files never leave your computer.All processing happens locally inside your browser.

Match exact text, number, boolean, or null values
Search only selected object and array paths
Copy or download pretty or minified JSON

1

Upload JSON

Choose a .json file. It is read only by this browser tab.

Drop a JSON file here

or use the file browser

2

Paste and validate JSON

UtilityDock detects exact leaf paths without changing your source.

JSON input

Paste JSON or upload a file to begin.

What JSON value replacement is

Change exact values without changing document structure

JSON value replacement searches selected leaf paths for one exact typed value and writes the replacement you choose. Property names, nesting, arrays, unmatched values, and record order remain intact.

API migration

Update legacy constants in request and response samples

Replace retired status strings, version labels, numeric identifiers, or feature flags across selected API fields. Exact typed matching prevents the text "1"from being confused with the number 1.

Data normalization

Standardize known values before downstream processing

Convert one known category label or sentinel value into the representation expected by an import, analytics pipeline, or internal dataset. Missing paths are skipped, while explicit null values can be matched intentionally.

Configuration updates

Change exact flags and settings with a reviewable preview

Update booleans, numbers, text, or nulls in selected configuration paths, then inspect every result before copying or downloading it. No patterns or conditional rules run behind the scenes.

Examples

Use explicit types for predictable replacements

Selected field	Find	Replace with
`status`	Text: pending	Text: active
`score`	Number: 0	Number: 10
`verified`	Boolean: false	Boolean: true
`note`	Null	Text: unknown

Modification utilities

Continue with related UtilityDock JSON workflows

JSON Property SwapperExchange exact property names or values safely.JSON RedactorMask selected sensitive fields.JSON Property MoverRelocate exact fields to new paths.JSON Property CopierDuplicate exact fields into new names or paths.JSON Array Field RenamerRename selected nested properties.JSON Array Field RemoverDelete selected properties across object arrays.JSON Patch GeneratorGenerate RFC 6902 modification operations.JSON Patch ApplierApply RFC 6902 operations locally.JSON Merge Patch ApplierApply an RFC 7386 update document.JSON Pointer ExplorerInspect exact paths throughout a document.

FAQ

Questions about replacing JSON values

Does UtilityDock upload or store my JSON?

No. Your files never leave your computer. Validation, field detection, replacement, preview, copying, and download creation all happen locally inside your browser.

Which JSON values can I replace?

Version 1 matches exact text, numeric, boolean, or null values in the selected fields. Text matching is case-sensitive.

Are JSON types preserved?

You explicitly choose the find type and replacement type. A numeric 1 is different from the text "1", and replacements are written using the type you select.

Can I replace values in nested fields?

Yes. UtilityDock detects nested object and indexed array paths, then searches only the exact leaf paths you select.

What happens to missing fields and null values?

Missing paths are skipped and never counted. Only explicit JSON null values match when the find type is Null.

Does this tool support patterns or case-insensitive matching?

No. Version 1 performs exact, case-sensitive matching without regular expressions, wildcards, conditional rules, or APIs.