Global Araç
Agent Json Validator
- +Şema JSON olarak ayrıştırıldı
- +Çıktı JSON olarak ayrıştırıldı
- +zorunlu alan "city" mevcut
- +zorunlu alan "units" mevcut
- +"city" türü = string
- +"units" türü = string
- +"days" türü = number
Zorunlu alan kontrollerini ve yüzeysel tür kontrollerini (string, number, boolean, array, object, null) destekler. Tam bir JSON-Şema doğrulayıcı değildir.
Validate JSON emitted by agents and tool calls — with line numbers and key counts.
Nasıl Kullanılır
- Paste the JSON.
- Read parse status and errors.
- Copy the pretty-printed output.
Sık Sorulan Sorular
Why do LLM agents return malformed JSON?
Older models (GPT-3.5, Claude 2) frequently drop closing brackets, add trailing commas, or escape quotes wrong. Modern models (GPT-4o, Claude Opus 4, Gemini 2.5) are much better but still occasionally fail on edge cases. Tool-use APIs with structured output guarantees (function calling) solve this at the API level.
What's JSON mode in OpenAI / Claude?
Both vendors now support 'JSON mode' that forces the model's output to be valid parseable JSON. OpenAI calls it response_format: {type: 'json_schema'} with strict schema. Claude has tool-use schema enforcement. These are more reliable than prompting for JSON in the instruction.
Should I repair malformed JSON programmatically?
Yes, for production. Libraries like json-repair (Python) and jsonrepair (JS) fix common LLM output mistakes. Catch-and-repair pattern: try strict parse first, fall back to repair, fall back to re-prompting the LLM with the error. Reduces agent failure rates by 50-80%.
What are common JSON agent mistakes to watch for?
Single quotes instead of double. Python True/False/None instead of JSON true/false/null. Trailing commas. Un-escaped quotes inside strings. Missing closing brackets on nested arrays. Comments (not valid JSON). Our validator catches these with line:col error messages.