PEM and ASN.1 structure viewing
Decode the DER data in the PEM to view the node hierarchy, byte offset, and object identifiers.
It is only processed in the browser, not uploading or saving. Leaving the page will be cleared; the calculation can also be cleared and the result can be discarded. Do not enter other people's credentials or private keys.
PEM and ASN.1 structure viewing User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- Check out the coding structure of the demo ASN.1 integer sequence.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
Parsing by DER mark and determining length, limit the hierarchy, number of nodes and the number of displayed bytes, and calculate SHA256.
scope of use
Up to 64KB decode data and 1000 nodes; do not verify the certificate signature, trust chain or complete ASN.1 semantics, and reject the private key block.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
Up to 64KB decode data and 1000 nodes; do not verify the certificate signature, trust chain or complete ASN.1 semantics, and reject the private key block. Please compare the input unit, rounding method, applicable rules and data version first.



