---
title: "How to Get Clean JSON Output from DeepSeek API Without Markdown Fences?"  
description: "How to Get Clean JSON Output from DeepSeek API Without Markdown Fences?"  
author: "Anubhav Sharma"  
published: 2026-09-03  
updated: 2026-09-03  
canonical: https://answers.mindstick.com/qa/117146/how-to-get-clean-json-output-from-deepseek-api-without-markdown-fences  
category: "DeepSeek"  
tags: ["DeepSeek", "api", "JSON", "ai agent", "ml.net"]  
reading_time: 1 minute  

---

# How to Get Clean JSON Output from DeepSeek API Without Markdown Fences?

**Using DeepSeek's API for a small tool. I ask for JSON and it keeps wrapping the output in ```json fences or adding "Here is your JSON:" before it. My parser dies every time. How do I make it behave?**

## Answers

### Answer by Ponu Maurya

Three things, do all of them.

- Turn on JSON mode in the API call if it's available for the model you're using. That forces valid JSON.
- In your system prompt, be blunt: "Output only a raw JSON object. No explanation. No markdown. No code fences." And give it an example of the exact shape you want, that helps more than any instruction.
- And then, this is the part everyone skips, assume it'll still mess up sometimes. Before parsing, strip anything that looks like ``` from the start and end. Wrap the parse in try/except. If it fails, send the bad output back with "fix this so it's valid JSON" or just retry. No model gets formatting right 100% of the time, so build for that instead of hoping.


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Original Source: https://answers.mindstick.com/qa/117146/how-to-get-clean-json-output-from-deepseek-api-without-markdown-fences

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