Coding⏱️ 2 min read📅 2026-06-04

How to Fix: How to solve Flutter CERTIFICATE_VERIFY_FAILED error while performing a POST request?

Learn how to easily fix and troubleshoot How to Fix: How to solve Flutter CERTIFICATE_VERIFY_FAILED error while performing a POST request? with our st

Quick Answer: 1-2 sentences of direct conversational advice.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

The CERTIFICATE_VERIFY_FAILED error occurs when the client (in this case, your Flutter app) is unable to verify the local issuer certificate of the server. This can be due to various reasons such as outdated or missing certificates, incorrect certificate chain, or issues with the HTTP client library.

🛑 Root Causes of the Error

  • Outdated or missing certificates on the server.
  • Incorrect certificate chain.
  • Issues with the HTTP client library.

✅ Best Solutions to Fix It

Method 1: Bouncy Castle

  1. Step 1: Add the bouncy castle package to your pubspec.yaml file.

Method 2: Ignore Invalid Certificates

  1. Step 1: Use the ignoreCertificates option when creating an HTTP client.

✨ Wrapping Up

By following these methods, you should be able to resolve the CERTIFICATE_VERIFY_FAILED error and successfully send POST requests from your Flutter app.

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