String Utilities

A mod that provides more NBT string operations.

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fabricforgeneoforgeutility

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About this Mod

String Utilities Mod

A mod that provides more NBT string operations.
一个提供更多 NBT 字符串操作的模组。

Syntax 语法

/string <method> [target] [source...]

The target and source parts are similar to what follows the data modify command.
target和source部分与data modify命令后面的部分类似。

Example 例子

/string isEmpty value "" returns 1
/string indexOf value "asdfghjkl" value "qwerty" returns -1
/string escape storage a:b c value '\'quote"slash\\' stores 'quote\"slash\\ into a:b/c
/string strip storage foo:bar baz value " a 123 " stores a 123 into foo:bar/baz
/string concat2 storage a b from entity @s SelectedItem.id from entity @s Inventory[0].id
/string join storage test playerUUID from value "~" from @s UUID

Available Methods 可用的方法

Name	Source	Target	Return Value
`isBlank`	`String`	-	`1` if the input is a blank string, `0` otherwise.
`isEmpty`	`String`	-	`1` if the input is a empty string, `0` otherwise.
`length`	`String`	-	String length.
`toString`	Any NBT Element	`String`	String length.
`toJson`	Any NBT Element	`String`	String length.
`escape`	`String`	`String`	String length.
`escapeNbt`	`String`	`String`	String length.
`escapeRegex`	`String`	`String`	String length.
`toLowerCase`	`String`	`String`	String length.
`toUpperCase`	`String`	`String`	String length.
`toLowerCaseInvariant`	`String`	`String`	String length.
`toUpperCaseInvariant`	`String`	`String`	String length.
`strip`	`String`	`String`	String length.
`stripLeading`	`String`	`String`	String length.
`stripTrailing`	`String`	`String`	String length.
`toCharArray`	`String`	`List<String>`	Count of code points.
`toCodePointStrings`	`String`	`List<String>`	Count of code points.
`toCodePoints`	`String`	`IntArray`	Count of code points.
`fromCodePoints`	`IntArray`	`String`	String length.
`breakCharacters`	`String`	`List<String>`	Count of results.
`breakCharactersInvariant`	`String`	`List<String>`	Count of results.
`breakLines`	`String`	`List<String>`	Count of results.
`breakLinesInvariant`	`String`	`List<String>`	Count of results.
`breakSentences`	`String`	`List<String>`	Count of results.
`breakSentencesInvariant`	`String`	`List<String>`	Count of results.
`breakWords`	`String`	`List<String>`	Count of results.
`breakWordsInvariant`	`String`	`List<String>`	Count of results.
`concat`	`List<String>`	`String`	String length.
`concat2`	`String s0, String s1, [String s2]`	`String`	String length.
`trim`	`String src, [String trimChars]`	`String`	String length.
`trimStart`	`String src, [String trimChars]`	`String`	String length.
`trimEnd`	`String src, [String trimChars]`	`String`	String length.
`at`	`String src, Int index`	`String`	Unicode code point.
`codePointAt`	`String src, Int index`	`String`	Unicode code point.
`codePointBefore`	`String src, Int index`	`String`	Unicode code point.
`repeat`	`String src, Int count`	`String`	String length.
`matchesAll`	`String src, String pattern`	`List<Compound(Int start, Int end)>`	Count of match results.
`matchesAllFully`	`String src, String pattern`	`List<Compound(Int start, Int end)>`	Count of match results.
`join`	`String delimiter, List elements`	`String`	String length.
`substring`	`String src, Int begin, [Int end]`	`String`	String length.
`substring2`	`String src, Int begin, [Int length]`	`String`	String length.
`split`	`String src, String separator, [Int limit]`	`List<String>`	Count of splitted string parts
`indexOf`	`String src, String substring, [Int fromIndex]`	`String`	The index of the first occurrence of the substring, or `-1` if the substring is not contained.
`lastIndexOf`	`String src, String substring, [Int fromIndex]`	`String`	The index of the last occurrence of the substring, or `-1` if the substring is not contained.
`startsWith`	`String src, String prefix, [Int offset]`	-	`1` if the second input is a prefix of the first input, `0` otherwise.
`endsWith`	`String src, String suffix`	-	`1` if the second input is a suffix of the first input, `0` otherwise.
`contains`	`String src, String substring`	-	`1` if the first input contains the second input, `0` otherwise.
`matches`	`String src, String regex`	-	`1` if the first input matches the second input, `0` otherwise.
`replace`	`String src, String target, String replacement`	`String`	String length.
`replaceAll`	`String src, String regex, String replacement`	`String`	String length.
`replaceFirst`	`String src, String regex, String replacement`	`String`	String length.

Note: Some methods actually accept any NBT element, but convert it to a string before processing.
注：有些方法实际上接受任何 NBT 元素，但在处理之前将其转换为字符串。

Available Versions

String Utilities v1.1-fabric-1.21.5release

MC 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11fabric

December 27, 2025

String Utilities v1.1-forge-like-1.21.5release

MC 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11forge, neoforge

December 27, 2025

String Utilities v1.1-forge-like-1.20.5release

MC 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4forge, neoforge

December 26, 2025

String Utilities v1.1-fabric-1.20release

MC 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4fabric

December 26, 2025

String Utilities v1.1-neoforge-1.20release

MC 1.20.2, 1.20.3, 1.20.4neoforge

December 26, 2025

How to Install String Utilities on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "String Utilities". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforgeneoforge

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+40 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

String Utilities server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is String Utilities compatible with fabric and forge and neoforge?

String Utilities officially supports fabric, forge, neoforge for Minecraft 1.21.11, 1.21.10, 1.21.9. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with String Utilities – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if String Utilities consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.