Swift JSON Fix

The ultimate lightning-fast solution for repairing any broken or malformed JSON. This Apify Actor transforms invalid JSON strings into perfectly valid JSON, no matter how badly corrupted.

Transform Broken JSON Into Valid JSON

Swift JSON Fix handles virtually every type of JSON error:

• ✅ Missing quotes, brackets, and commas
• ✅ Mixed single/double quotes
• ✅ Improperly escaped characters
• ✅ Trailing commas and malformed arrays
• ✅ JavaScript-style comments and syntax
• ✅ LLM output formatting issues
• ✅ Markdown code blocks and extra text

LLM JSON Fix Specialist

Large Language Models (LLMs) like ChatGPT, Claude, Llama, and others frequently produce malformed JSON responses:

• Different LLMs produce different types of JSON errors
• Models often mix single and double quotes
• Missing commas and unescaped quotes are common
• JSON is frequently wrapped in markdown code blocks
• Hallucinated properties and inconsistent formatting
• Models sometimes add explanatory text around the JSON

Swift JSON Fix is specifically designed to handle these AI-generated inconsistencies, making it perfect for production AI applications where reliable JSON parsing is critical.

Simple to Use

Just provide the broken JSON, get back valid JSON:

1. Input your malformed JSON string
2. Get a perfectly formatted valid JSON response

No complex configuration needed.

Perfect For

• AI Applications: Fix JSON from ChatGPT, Claude, Llama, and other LLMs
• Data Pipelines: Clean and standardize JSON before processing
• API Integration: Handle inconsistent JSON from external sources
• Development: Debug and fix JSON syntax errors
• Data Migration: Repair corrupt JSON files

Why Swift JSON Fix?

• Universal Compatibility: Works with any JSON format, no matter how broken
• Zero Dependencies: Completely self-contained solution
• Lightning Fast: Efficient processing even for large JSON files
• Deterministic Results: Consistent repairs for predictable outcomes
• Non-Destructive: Preserves the original data structure and values

Technical Details

The Actor employs an advanced JSON parsing engine that:

• Reconstructs malformed JSON using formal grammar rules
• Intelligently adds missing structural elements
• Properly escapes string values
• Normalizes different quote styles
• Removes invalid syntax

Try It Now

Transform broken JSON into valid JSON with just one API call.