Choose a file to convert. It's processed locally — never uploaded. Tip: add several files to convert them all at once.
Result appears here after you select
{ } How to use
- Choose the .p7b or .p7c file.
- Select Process.
- Copy or download the PEM certificates, which come out in the order the file listed them.
{ } How it works
P7B to PEM Converter works on the file you upload. Select Process ▸ and it runs entirely in your browser — nothing is uploaded to a server — then shows the result in the Output panel.
Input
- PKCS#7 file — upload a file (.p7b,.p7c,.p7s,.der,.pem); it is read locally in your browser
Output
TXT text — copy or download it from the Output panel.
{ } Common uses
- Turn a Windows-style chain file into the PEM bundle Apache or nginx wants.
- Pull the intermediate certificates out of a chain a certificate authority sent you.
{ } Limitations
- A .p7b carries certificates only — never a private key. If you need the key too, you are looking for a .pfx.
- Signed .p7s files are read for their certificates; the signature itself is not checked.
{ } FAQ
Is my data uploaded to a server?
No. Everything runs locally in your browser — your files never leave your device.
Can I process more than one file at once?
Yes — add several files and they’re all processed and downloaded together as a ZIP.
Is this tool free?
Yes — it’s completely free and needs no sign-up.
My .p7b opens as text, not binary. Will that work?
Yes. PKCS#7 files come both ways — raw binary, or Base64 between BEGIN PKCS7 lines — and either is accepted without you having to know which you were sent.
Is my private key uploaded anywhere?
No. Every one of these tools runs entirely in your browser — the certificate and key are read, converted and shown without a byte being sent anywhere. That is what makes it safe to paste a private key, which you should never do on a site that converts it on a server.
Does this work with ECDSA certificates?
Yes. RSA, ECDSA and Ed25519 are all read the same way, because the structure is read directly rather than through a library that only understands RSA keys.