OmniConvert

X.509 certificate → JSON

Category

Decode an X.509 certificate (PEM or DER) and extract fields as JSON

PEM / DER certificate→JSON

Drop a file or click to browse

Accepted: .pem,.crt,.cer,.der

or paste below

Related Security conversions

  • PEM → DER— Convert a PEM certificate or key to binary DER format
  • DER → PEM— Convert a binary DER certificate to base64-encoded PEM format
  • JWT → JSON (decode)— Decode a JWT token and extract the header and payload as JSON — no verification, client-safe
  • SSH public key → JSON— Parse an SSH public key and extract its type, fingerprint, and key info as JSON
  • CSR → JSON— Decode a PEM certificate signing request (CSR) and extract subject and metadata as JSON

About this conversion

Decode an X.509 certificate (PEM or DER) and extract fields as JSON. This converter processes your PEM / DER certificate file server-side and returns a JSON file instantly — no account, no software installation, and no file storage. Files are deleted from our servers immediately after conversion.

How to convert PEM / DER certificate to JSON

  1. 1. Upload — drag your PEM / DER certificate file onto the converter above, or click to browse.
  2. 2. Convert — press Convert. Processing happens on secure servers in seconds.
  3. 3. Download — your JSON file downloads automatically. No sign-up required.

Frequently Asked Questions

How do I convert PEM / DER certificate to JSON?
Upload your PEM / DER certificate file above, click Convert, and download the JSON result instantly. No account or software needed.
Is converting PEM / DER certificate to JSON free?
Everyone gets 2 free conversions with no account required. Additional conversions are available via credit packs starting at $2 — credits never expire.
Are my files stored or shared?
No. Files are processed in server memory and deleted immediately after conversion. Nothing is written to disk or retained.
Do I need to install anything?
No software installation needed. OmniConvert runs in the browser — just upload, convert, and download.

No account needed · Credits never expire · Share your token link across devices