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JSON Data Censor

World's Simplest JSON Tool

Free online JSON censoring tool. Just load your JSON in the input field and all sensitive data in it will automatically get censored. In the tool options, you can customize which values should be censored. You can censor keys and values in objects, values in arrays, and numbers in numeric data types. Also, you can specify the string to replace sensitive data with in the output JSON. Created for developers by developers from team Browserling.

JSON Data Censor

World's Simplest JSON Tool

Free online JSON censoring tool. Just load your JSON in the input field and all sensitive data in it will automatically get censored. In the tool options, you can customize which values should be censored. You can censor keys and values in objects, values in arrays, and numbers in numeric data types. Also, you can specify the string to replace sensitive data with in the output JSON. Created for developers by developers from team Browserling.

Tool Options

String Censoring

Censor text values in JSON.
Strings to censor (one per line).
Replace values with this string.
Match the case of strings.
Repeat the replacement string to match the value length.
Replace only full words in strings.

Key Censoring

Censor object keys in JSON.
Keys to censor (one per line).
Replace keys with this string.
Match the case of keys.
Repeat the replacement string to match the key length.
Replace only full words in keys.

Number Censoring

Censor numeric data types in JSON.
Numbers to censor (one per line). Enter individual numbers or ranges (e.g., "-5 - 10").
Replace numbers with this number or string.

JSON Output

Pretty-print the output JSON and add space indents.
Number of spaces in one indent.
Pretty-print the output JSON and add tab indents.
Output JSON in a minified format without indentation.

What Is a JSON Data Censor?

This tool makes it easy to remove or hide all unwanted words, strings, patterns, keys, and numbers from the given JSON data structure. It allows you to quickly censor confidential information, personal data, phone numbers, and other sensitive records. In the tool options, you can manage which parts of the JSON data structure should be censored. In particular, to censor data in JSON strings, activate the "Censor JSON Strings" checkbox and specify all the patterns that should be concealed in the multi-line option. Then, enter a new pattern to use in place of the hidden value. For example, you can replace the individual's name "Sam" with the asterisk symbol "*" or another placeholder of your choice, such as "[REDACTED]". If you are replacing a longer word with a single symbol or a shorter pattern, you can enable the "Mask Each Symbol" option, which will make the replacement the same length as the original value. If this option is on, then in the same example, the word "Sam" will be replaced with three asterisk symbols "***" (one for each letter). If the string that you want to replace is used in both as an independent word and as part of another word (for example, "Sam" can be an independent word or used in the word "Sample"), then you can activate the "Match Full Words Only" option to censor only independent word. To censor keys in JSON objects, activate the "Censor JSON Keys" checkbox. Then, in a similar way, enter the keys you want to replace and specify their replacements. Optionally, you can also configure the case sensitivity of the patterns. To censor numeric values in JSON, activate the "Censor JSON Numbers" option. This option only replaces numeric data types that are not surrounded by quotes. For example, you can censor age, price, or geographic coordinates. The numbers you want to censor can be specified in a vertical list in the multi-line option one by one (for example, "10", "-25", or "32.65"). To quickly censor multiple numbers in JSON, you can specify a range of values. For example, the range "1-100" will censor all numbers from 1 to 100, and the range "-50--5" will censor all numbers from -50 to -5. A new number or a string can be set in place of the censored number. For example, you can replace all numbers with just zero "0" or a string "[NUMERIC]". Finally, you can choose the format for outputting JSON with censored data. In particular, you can choose whether to use a prettified JSON format with indentation, select spaces or tabs for indentation, or output a minified JSON without indentation. Json-abulous!

What Is a JSON Data Censor?

This tool makes it easy to remove or hide all unwanted words, strings, patterns, keys, and numbers from the given JSON data structure. It allows you to quickly censor confidential information, personal data, phone numbers, and other sensitive records. In the tool options, you can manage which parts of the JSON data structure should be censored. In particular, to censor data in JSON strings, activate the "Censor JSON Strings" checkbox and specify all the patterns that should be concealed in the multi-line option. Then, enter a new pattern to use in place of the hidden value. For example, you can replace the individual's name "Sam" with the asterisk symbol "*" or another placeholder of your choice, such as "[REDACTED]". If you are replacing a longer word with a single symbol or a shorter pattern, you can enable the "Mask Each Symbol" option, which will make the replacement the same length as the original value. If this option is on, then in the same example, the word "Sam" will be replaced with three asterisk symbols "***" (one for each letter). If the string that you want to replace is used in both as an independent word and as part of another word (for example, "Sam" can be an independent word or used in the word "Sample"), then you can activate the "Match Full Words Only" option to censor only independent word. To censor keys in JSON objects, activate the "Censor JSON Keys" checkbox. Then, in a similar way, enter the keys you want to replace and specify their replacements. Optionally, you can also configure the case sensitivity of the patterns. To censor numeric values in JSON, activate the "Censor JSON Numbers" option. This option only replaces numeric data types that are not surrounded by quotes. For example, you can censor age, price, or geographic coordinates. The numbers you want to censor can be specified in a vertical list in the multi-line option one by one (for example, "10", "-25", or "32.65"). To quickly censor multiple numbers in JSON, you can specify a range of values. For example, the range "1-100" will censor all numbers from 1 to 100, and the range "-50--5" will censor all numbers from -50 to -5. A new number or a string can be set in place of the censored number. For example, you can replace all numbers with just zero "0" or a string "[NUMERIC]". Finally, you can choose the format for outputting JSON with censored data. In particular, you can choose whether to use a prettified JSON format with indentation, select spaces or tabs for indentation, or output a minified JSON without indentation. Json-abulous!


JSON Data Censor Examples

Click to try!
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Censor Personal Information

In this example, we hide the personal information of a person in a JSON record. The unwanted data resides in the string values of a JSON object, so we activate the "Censor JSON Strings" option and configure the masking options. We replace the first name, the last name, and the last four digits of the phone number with asterisks (*). The number of asterisks corresponds to the length of the hidden value. Additionally, we disable the case sensitivity option to simultaneously replace the first name and last name written in both uppercase and lowercase letters.

{ "first_name": "Ava", "last_name": "Brown", "email": "ava.brown@company.com", "phone": "454-767-8899" }
{ "first_name": "***", "last_name": "*****", "email": "***.*****@company.com", "phone": "454-767-****" }
Required options
These options will be used automatically if you select this example.
Censor text values in JSON.
Strings to censor (one per line).
Replace values with this string.
Match the case of strings.
Repeat the replacement string to match the value length.
Replace only full words in strings.
Censor object keys in JSON.
Censor numeric data types in JSON.
Pretty-print the output JSON and add space indents.
Number of spaces in one indent.
click me

Hide Sensitive User Preferences

In this example, we protect a user's privacy by hiding sensitive data that contains their political views in both the JSON object's key and value. We do it by specifying the key "political_views" in the JSON-key censoring option and the value "liberal" in the JSON-value censoring option. We replace this data with the string "[OMITTED]", effectively masking the user's political views. Moreover, we preserve the input structure of the JSON by adding tab indentation to the output JSON.

{ "user_id": "user123", "preferences": { "language": "en", "theme": "dark", "political_views": "liberal" } }
{ "user_id": "user123", "preferences": { "language": "en", "theme": "dark", "[OMITTED]": "[OMITTED]" } }
Required options
These options will be used automatically if you select this example.
Censor text values in JSON.
Strings to censor (one per line).
Replace values with this string.
Match the case of strings.
Repeat the replacement string to match the value length.
Censor object keys in JSON.
Keys to censor (one per line).
Replace keys with this string.
Match the case of keys.
Repeat the replacement string to match the key length.
Censor numeric data types in JSON.
Pretty-print the output JSON and add tab indents.
click me

Redact Sensitive Financial Details

In this example, we redact the balance and all transaction amounts from an exported financial document in JSON format. As the balance and transactions have numerical data types, to hide them, we activate the "Censor JSON Numbers" option. Then we specify the current balance in the options as "1201.50" and to hide all transactions, we specify a range of transaction amounts as "1-1000". As a result, all numerical data are replaced with the value "0", ensuring that financial information remains confidential.

{ "balance": 1200.50, "transactions": [ { "date": "2024-05-15", "amount": 50.35, "description": "Groceries" }, { "date": "2024-05-10", "amount": 42.80, "description": "Beauty and health" } ] }
{ "balance": 0, "transactions": [ { "date": "2024-05-15", "amount": 0, "description": "Groceries" }, { "date": "2024-05-10", "amount": 0, "description": "Beauty and health" } ] }
Required options
These options will be used automatically if you select this example.
Censor text values in JSON.
Censor object keys in JSON.
Censor numeric data types in JSON.
Numbers to censor (one per line). Enter individual numbers or ranges (e.g., "-5 - 10").
Replace numbers with this number or string.
Pretty-print the output JSON and add space indents.
Number of spaces in one indent.

Pro tips Master online json tools

You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!

https://onlinetools.com/json/censor-json?input=%7B%0A%20%20%22first_name%22%3A%20%22Ava%22%2C%0A%20%20%22last_name%22%3A%20%22Brown%22%2C%0A%20%20%22email%22%3A%20%22ava.brown%40company.com%22%2C%0A%20%20%22phone%22%3A%20%22454-767-8899%22%0A%7D&censor-strings=true&case-sensitive-strings=false&strings-from=Ava%250ABrown%250A8899&string-to=%252A&match-string-length=true&match-words-in-strings=false&censor-keys=false&censor-numbers=false&use-space-indent=true&number-of-spaces=2

All JSON Tools

Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
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Quickly convert a JSON string to JavaScript data.
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Quickly escape special JSON characters.
Quickly unescape an escaped JSON string.
Quickly convert a JSON data structure to an XML file.
Quickly convert an XML file to a JSON data structure.
Quickly convert a JSON data structure to a YAML markup.
Quickly convert a YAML markup to a JSON data structure.
Quickly convert a JSON file to a TSV file.
Quickly convert TSV data to a JSON file.
Quickly convert a JSON file to a CSV file.
Quickly convert CSV data to JSON data.
Quickly convert a JSON structure to binary JSON encoding.
Quickly convert JSON to a PNG, GIF, JPG, or BMP image.
Quickly create a screenshot from JSON code.
Quickly encode JSON to base64.
Quickly decode base64 to JSON.
Quickly convert JSON to URL-encoding.
Quickly convert URL-escaped JSON back to JSON.
Quickly convert JSON data to plain text.
Quickly edit a JSON file in a neat JSON editor in your web browser.
Quickly extract keys from objects in JSON data.
Quickly extract values from objects in JSON data.
Quickly reduce the nesting level of an array of arrays.
Quickly create a single-level JSON object from nested JSON objects.
Quickly rewrite JSON strings, keys, and values using escape codes.
Quickly obfuscate a JSON data structure.
Quickly remove certain information from a JSON data structure.
Quickly display detailed information about a JSON data structure.
Quickly convert a JSON file to properties file.
Quickly convert a properties file to a JSON file.

Coming Soon

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Create a text list from a JSON array or object.

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Convert a JSON file to a CSON file.

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Convert a CSON file to a JSON file.

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Convert a TOML file to a JSON file.

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Convert a JSON data structure to Bencode encoding.

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Convert Bencode data to JSON data.

Convert JSON to JSONL

Convert a JSON file to a JSONL file.

Convert JSONL to JSON

Convert a JSONL file to a JSON file.

Convert BSON to JSON

Convert binary JSON data structure (BSON) to JSON.

Convert JSON to UBJSON

Convert a JSON file to a universal binary JSON (UBJSON).

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Convert universal binary JSON (UBJSON) to regular JSON.

Convert JSON to Message Pack

Serialize JSON data to binary MessagePack format.

Convert Message Pack to JSON

Unserialize binary MessagePack to a JSON struct.

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Serialize JSON data to binary Protobuf format.

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Unserialize binary Protobuf to a JSON struct.

Convert JSON to a LaTeX Table

Generate a LaTeX table from a JSON object.

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Convert a JSON data file to an INI configuration file.

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Convert an INI configuration file to JSON data file.

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Loop over JSON structure and truncate all values or keys.

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Find the nesting depth of a JSON data structure.

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Convert a JSON data structure to a data URL.

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Create a PHP data structure from a JSON data structure.

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Diff JSON files and show differences visually.

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Lexicographically sort the order of JSON object keys.

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Exchange keys with values in a JSON file.

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Create a JSON array with random values.

Create a Random JSON Object

Create a JSON object with random keys and values.

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Randomly change the positions of array elements.

Randomize a JSON Object

Randomly change the order of key, value pairs.

Add Spacing to JSON

Add random spaces and newlines in a JSON file.

Tokenize JSON

Tokenize a JSON data structure.

Remove JSON Syntax

Remove all JSON syntax and leave just the values.

Change JSON Syntax

Change curly braces, commas, and quotes to other symbols.

Fix Quotes in JSON

Fix incorrectly quoted (usually single quote) keys and values.

Use Single Quotes in JSON

Make all keys and values in a JSON to be single-quoted.

Use Double Quotes in JSON

Make all keys and values in a JSON to be double-quoted.

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Execute a jq query on a JSON data structure.

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Introduce errors in a JSON data structure.

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Try to fix a damaged JSON to the best of our ability.

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Create an abstract visualization of JSON's complexity.


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We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling, our mission is to make people's lives easier, so we created this collection of JSON tools. Our tools have the simplest user interface that doesn't require advanced computer skills and they are used by millions of people every month. Behind the scenes, all JSON tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!

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