PFX to PEM Converter | PEM to PFX and P12

PFX to PEM converter that extracts the certificate, chain and key from a .pfx or .p12 file, or builds a PFX from PEM. Opens legacy 3DES files. No upload. Designed specifically for developers and professionals, this free online converter runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.

Also known as: pfx to pem converter · convert pfx to pem · pfx to pem and key · p12 to pem converter · pem to pfx converter · extract private key from pfx · pfx to crt and key · convert p12 to pem online · pfx to pem without openssl · pkcs12 converter

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PFX / P12 Input

PFX password

RSA key as BEGIN RSA PRIVATE KEY

Decrypted in this tab with the Web Crypto API. The file, password and key are never uploaded or saved.

PEM Output

About PFX to PEM Converter

A PFX to PEM converter turns a .pfx or .p12 bundle, the format Windows, IIS and Java keystores export, into the separate PEM files that nginx, Apache, HAProxy and most Linux tools expect: the server certificate, the intermediate chain and the private key. It also works in reverse and builds a password-protected PFX from PEM files. Everything is decrypted in your browser, so the key and password stay on your machine.

Key Features

Extracts the server certificate, the intermediate chain and the private key, with separate cert.pem, chain.pem and key.pem downloads
Opens modern AES-256 files and legacy 3DES, RC2 and RC4 files that OpenSSL 3 refuses without its legacy provider
Checks the password against the file's integrity MAC, including SHA-256, SHA-512 and PBMAC1 MACs
Orders the chain leaf first and confirms which certificate the private key belongs to
Builds a PFX with AES-256 and a SHA-256 MAC (the OpenSSL 3 default) or 3DES with SHA-1, matching the AES256_SHA256 and TripleDES_SHA1 options in Windows
Accepts base64 PFX text, the form Azure Key Vault secrets and Kubernetes secrets store certificates in

Use Cases

Moving a certificate exported from Windows Server or IIS to nginx or Apache on Linux
Pulling the private key out of a .p12 file that a CA or vendor sent you
Building a .pfx for Azure App Service or IIS from Let's Encrypt fullchain.pem and privkey.pem files
Creating a PKCS #12 keystore for a Spring Boot or Tomcat service
Checking the expiration date of every certificate inside a PFX before you install it

Supported Formats

.pfx

.p12

PKCS #12

PEM

DER

PKCS #8

PKCS #1

Base64

Related Keywords

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convert pfx to pem

pfx to pem and key

p12 to pem converter

pem to pfx converter

extract private key from pfx

pfx to crt and key

convert p12 to pem online

pfx to pem without openssl

pkcs12 converter

Why does OpenSSL 3 say "unsupported" when I open a PFX?

Older PFX files, including any made with openssl pkcs12 -export -legacy, encrypt the certificates with RC2-40. OpenSSL 3 disables RC2 by default, so openssl pkcs12 stops with error:0308010C:digital envelope routines::unsupported until you add -legacy. This converter implements RC2, RC4 and 3DES itself, so the same file opens here with no flags. Windows' Export-PfxCertificate also defaults to TripleDES_SHA1, which this tool reads and writes.

Your private key stays in this tab

The file, its password and the extracted key are processed with the Web Crypto API in your browser. Nothing is uploaded, and the key is never written to local storage, even with Pro auto-save.

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Frequently asked questions

What is PFX to PEM Converter used for?

PFX to PEM converter that extracts the certificate, chain and key from a .pfx or .p12 file, or builds a PFX from PEM. Opens legacy 3DES files. No upload.

Is PFX to PEM Converter free to use?

Yes. PFX to PEM Converter is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use PFX to PEM Converter?

No. PFX to PEM Converter works immediately in your browser with no signup, login, or email address required.

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