HomeCertificate Format Converter

Certificate Format Converter

Convert between PEM, PKCS12 (PFX), JKS and DER certificate formats with downloadable results

This tool requires uploading certificate files to the server for format conversion. All data is used only for this request and not stored.

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Documentation

What is Certificate Format Converter

This tool converts between common certificate/container formats such as PEM, PKCS12 (PFX/P12), JKS, and DER. It is useful for certificate deployment, migration, and compatibility handling.

Key Features

  • Supports multiple certificate format conversions.
  • Accepts certificate and private key uploads.
  • Supports source/target password inputs when required.
  • Provides downloadable output files after conversion.

Steps

  1. Select source and target formats.
  2. Upload certificate file (and private key if required).
  3. Fill password fields according to conversion mode.
  4. Start conversion and download generated files.

FAQ

Why do I get a missing private key error?

Some conversion paths (for example PEM to PKCS12/JKS) require both certificate and private key.

Why can JKS conversion fail more often?

JKS conversion is sensitive to alias, password, and certificate chain consistency.

Data is processed locally in your browser by default and will not be uploaded to any server. Upload will be clearly indicated if required.

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