Google/Oracle Java 21+ Beautifier, Minifier & Execution Console

Java Formatter

Beautify, format, validate, and minify Java source code with Java 21+ features (records, sealed classes, pattern matching, switch expressions, text blocks), document analytics, and safe sandboxed console execution preview.

Load Preset Template:
Indent Size:
Indent Type:
Java Version Standard:
Brace Style:
Input Java Source Code
0 chars
0 chars
Java Structure Valid: No syntax errors detected.
Valid Java 21+
Lines:0|Input Chars:0|Output Chars:0|Byte Size:0 B|Packages & Imports:0|Classes & Records:0|Interfaces & Enums:0|Methods & Constructors:0|Annotations (@...):0|Javadocs & Comments:0
Google/Oracle Java 21+ Formatting Standards & Developer Specification Reference
Java 21+ Language Features

Full support for Records (public record User(...)), Sealed Classes (sealed class Shape permits ...), Switch Expressions with Pattern Matching, and Text Blocks ("""...""").

Security Safeguards

Treats Java code strictly as text data for formatting. NEVER compiles or executes server binaries on the host machine, protecting server files and environment variables.

Google/Oracle Style Indentation

Formatted according to Google and Oracle Java Style Guides with 4 space indents, brace placement, generic type bound formatting, and annotation wrapping.

Text Block Preservation

Multiline Text Block ("""...""") string bodies are preserved verbatim without altering embedded indentation or stripping newlines.