HOCON Formatter
Format HOCON configuration files online for free. Our HOCON formatter applies consistent 4-space indentation, proper key-value spacing, clean substitution handling, and standard Typesafe Config conventions. Works with Akka, Play Framework, Spark, and all .conf files.
Paste your HOCON configuration to format it with consistent 4-space indentation, proper key-value spacing, clean substitution handling, and readable structure.
Why Use Our HOCON Formatter?
Instant Formatting
Our tool to format HOCON processes your content instantly in your browser. Format HOCON files of any size with zero wait time — perfect for configuration files, project setups, and CI/CD pipelines.
Secure & Private Processing
Your data never leaves your browser when you use our HOCON formatter online tool. Everything is processed locally using JavaScript, ensuring complete privacy and security for sensitive configuration data.
No File Size Limits
Format large HOCON files without restrictions. Our free HOCON Formatter handles any size input — from small configs to massive files with thousands of entries.
100% Free Forever
Use our HOCON Formatter completely free with no limitations. No signup required, no hidden fees, no premium tiers, no ads — just unlimited, free formatting whenever you need it. The best free HOCON formatter online available.
Common Use Cases for HOCON Formatter
Akka Configuration
Format actor system configs, dispatcher settings, cluster configurations, and remote/artery transport settings for Akka-based applications with clean nested block formatting.
Play Framework Settings
Clean up application.conf files for Play Framework projects including database connections, HTTP settings, security filters, and module configurations with consistent indentation.
Apache Spark Config
Format Spark configuration files with properly structured executor settings, memory allocations, shuffle parameters, and data source connections for readable cluster management.
Microservice Configuration
Standardize configuration files across JVM microservices with consistent formatting for service discovery, circuit breakers, and environment-specific overrides using substitutions.
Lightbend Ecosystem
Format configuration for Lagom, Alpakka, Akka HTTP, and other Lightbend ecosystem projects that use the Typesafe Config library with proper key-value spacing and nesting.
DevOps & Infrastructure
Clean up reference.conf and application.conf files for CI/CD pipelines, Docker deployments, and Kubernetes config management with proper environment variable substitutions.
Understanding HOCON Formatting
What is HOCON Formatting?
HOCON formatting is the process of restructuring HOCON (Human-Optimized Config Object Notation) — a superset of JSON developed by Lightbend for configuration files. It powers the Typesafe Config library and is the standard format for Akka, Play Framework, Apache Spark, and many JVM-based applications files (.conf) with consistent indentation, proper spacing around operators, organized sections, and clean line breaks — while preserving all data and semantics.HOCON is widely used for Akka dispatchers and actors, Play Framework routes and settings, Spark executor configurations, Lagom microservices, and environment-specific configuration overrides. Our free HOCON formatter online tool handles this instantly in your browser. Whether you need to format HOCON for Akka actor system configuration, Play Framework application.conf files, Apache Spark cluster settings, Lightbend ecosystem projects, microservice configuration management, and DevOps infrastructure config, our tool does it accurately and privately.
How Our HOCON formatter Works
- Input Your HOCON Content: Paste your HOCON content directly into the text area or upload a
.conffile from your device. Our HOCON formatter online tool accepts any valid HOCON input. - Instant Browser-Based Processing: Click the "Format HOCON" button. Our tool processes your content entirely in your browser — no data is sent to any server, ensuring complete privacy.
- Download or Copy Formatted Output: View the cleanly formatted output with statistics. Copy the formatted content to your clipboard or download it as a file.
What Gets Formatted
- Consistent Spacing: Normalizes whitespace around operators like
=for a clean, uniform appearance throughout the file. - Section Organization: Ensures proper blank lines between sections and table headers for better visual separation and readability.
- Comment Preservation: All comments are preserved exactly as written. Formatting never removes or modifies your annotations and documentation.
- Trailing Whitespace Removal: Removes unnecessary trailing whitespace from all lines while maintaining blank lines for structure.
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Frequently Asked Questions - HOCON formatter
A HOCON formatter is a tool that restructures HOCON files with consistent spacing, proper indentation, organized sections, and clean formatting — while preserving all data and semantics. Our HOCON formatter online tool processes everything in your browser for maximum speed and privacy.
No. Our HOCON formatter only changes the visual structure and whitespace in your HOCON files. All keys, values, comments, tables, and data structures remain exactly the same. The formatted output is semantically identical to the original.
Absolutely! Your data is completely secure. All formatting happens directly in your browser using JavaScript — no data is ever uploaded to any server. Your configuration files, secrets, and sensitive data never leave your device.
Yes, our HOCON formatter is 100% free with absolutely no hidden costs or limitations. There's no signup required, no premium tier, no usage limits, no file size restrictions, and no advertisements. Use it unlimited times for any project.
Yes! Our HOCON formatter online tool handles files of any size. Since all processing happens in your browser, performance depends on your device, but modern browsers handle even very large HOCON files efficiently.
Yes! Our HOCON formatter handles all Typesafe Config-based configurations including Akka actor systems, dispatchers, cluster settings, Play Framework application.conf, routes, security filters, and module configurations.
Our formatter correctly preserves all HOCON substitutions — both required (${variable}) and optional (${?variable}). Content inside substitution expressions is never modified, and spacing around substitutions in assignments is properly normalized.
Yes! The formatter properly handles all HOCON-specific syntax including += for list appending, include directives, unquoted keys and values, path expressions with dot notation, and multi-line strings with triple quotes.
HOCON is a superset of JSON that adds: unquoted keys and values, // and # comments, include directives, ${...} substitutions, += list appending, multi-line strings, key path merging, and optional root braces. Any valid JSON is also valid HOCON, but HOCON offers much more flexibility for configuration.