Beveiliging & Cryptografie Converter

Uitgebreide beveiligingstoolkit voor certificaatconversie, cryptografische bewerkingen en beveiligingshulpmiddelen. Converteer tussen PEM/DER/PFX-formats, genereer CSR's, bekijk SSL-certificaten, maak veilige wachtwoorden, bereken hashes en voer PGP/AES-encryptie/ontsleuteling uit - alles veilig verwerkt in je browser.

Overview

This all-in-one security and cryptography toolkit runs entirely inside your browser, so your private keys, certificates, and sensitive data never leave your device. Convert between PEM, DER, and PFX/PKCS12 certificate formats, generate Certificate Signing Requests, inspect SSL certificates, compute MD5/SHA hashes, AES-encrypt text, sign and verify JWTs, and encode/decode Base64 or URL strings — 16 operations in a single tool. Because every operation executes locally via WebAssembly and the Web Crypto API, there is no server to intercept credentials or private keys, which matters most when the files you are handling are security-critical by definition.

Common Use Cases

  • Certificate Format Conversion — DevOps engineers convert PEM certificates to DER binary or PFX/PKCS12 bundles when deploying to servers, load balancers, or Windows certificate stores that require a specific format.
  • CSR Generation — Developers generate a Certificate Signing Request directly in the browser to submit to a Certificate Authority without exposing the private key to any third-party service.
  • JWT Debugging — Backend developers sign and verify JSON Web Tokens to confirm payload integrity and expiry during API development or incident investigation.
  • Hash Verification — Security professionals compute MD5, SHA-1, SHA-256, or SHA-512 checksums to verify file integrity or validate credentials stored in a database.
  • Quick AES Encryption — Teams AES-encrypt sensitive configuration snippets or secrets before sharing them over chat, confident the plaintext never transits a third-party server.

How It Works
1

Choose an Operation

Pick one of 16 operations from the selector — certificate conversion (PEM/DER/PFX), CSR generation, SSL viewer, hash generator, AES encrypt/decrypt, JWT sign/verify, Base64, or URL encoding.

2

Provide Your Input

Depending on the operation, drop a certificate file (.pem, .der, .pfx) or paste text directly into the input field. Some operations (password generator, CSR) require only configuration options.

3

Download or Copy the Result

All cryptographic work runs locally in your browser using WebAssembly. Copy the output to clipboard or download the converted file — nothing is sent to any server at any point.

Frequently Asked Questions

Are my private keys and certificates safe to use here?
Yes. Every operation runs entirely inside your browser using WebAssembly and the Web Crypto API. Your certificates, private keys, and plaintext are never uploaded to any server and never leave your device.

Which certificate formats can I convert between?
The tool supports PEM to DER, DER to PEM, PFX/PKCS12 to PEM, and PEM to PFX/PKCS12. These cover the most common conversion paths for web servers, Java keystores, and Windows certificate stores.

What hash algorithms does the hash generator support?
You can compute MD5, SHA-1, SHA-256, and SHA-512 hashes. Input can be any text string, and the result is returned as a lowercase hex digest ready to copy.

Can I use this to debug or validate JWT tokens?
Yes. The JWT Sign operation lets you create signed tokens with a secret or key, while JWT Verify checks the signature and decodes the payload — useful for debugging auth flows without sending tokens to an external service.

What does the CSR Generator produce?
It generates a PEM-formatted Certificate Signing Request along with the corresponding private key, based on the organization and domain details you enter. You submit the CSR to a Certificate Authority to obtain a signed SSL/TLS certificate.

Is there a file size limit?
Certificate and key files are capped at 10 MB, which is far larger than any real-world certificate or key file. Text-based operations (hashing, AES, JWT, encoding) have no meaningful size restriction for typical use.

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