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GPG ASC
File conversion

Convert GPG to ASC

Verified by Adam B.· reviewed by FE Editorial ·updated Jun 23, 2026
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Is it possible to convert GPG to ASC?
Yes - GPG converts to ASC.

Run gpg --armor --output file.asc file.gpg with GnuPG; no cryptographic content changes and the resulting .asc can be sent safely by email or pasted into text fields. Reverse the process at any time with gpg --dearmor.

Also to ASC: SEC · SIG · PGP

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert GPG to ASC?

ASCII-armored .asc files survive email, plain-text form fields, and copy-paste intact, whereas binary .gpg data is often corrupted in transit; use .asc when sharing encrypted files or public keys through email or web forms.

How to convert GPG to ASC

GnuPG OPEN-SOURCE

Run gpg --armor --output file.asc file.gpg in a terminal; GnuPG is free and available on Windows, macOS, and Linux.

Gpg4win OPEN-SOURCE

Install Gpg4win, which bundles GnuPG, then run gpg --armor --output file.asc file.gpg in Command Prompt or PowerShell - the Kleopatra GUI does not expose armoring as a standalone operation.

About these formats

.GPG GnuPG Encrypted File

A .gpg file is binary data produced by GnuPG (GNU Privacy Guard), the free OpenPGP encryption tool. Most .gpg files are encrypted - to read one you need GnuPG plus the right passphrase or…

Open .GPG details →
.ASC OpenPGP ASCII-Armored File

An ASC file is almost always an OpenPGP ASCII-armored block: a digital signature, a public key, or an encrypted message from PGP or GnuPG, encoded as readable Base64 text. Open it in a text…

Open .ASC details →

Quality & what to watch

  • No data is lost; armoring is a pure Base64 encoding operation and the cryptographic content is bit-for-bit identical between .gpg and .asc.
  • Check the file in a text editor before running gpg --armor - if it already starts with -----BEGIN PGP, it is already armored; running the command again will double-armor it.
  • Never upload a .gpg containing encrypted messages or private key material to an online tool; run GnuPG locally.

Frequently asked questions

What is the difference between `.gpg` and `.asc`?
They hold the same OpenPGP data - .gpg is binary and .asc is the same content encoded as ASCII (Base64) text with a -----BEGIN PGP header.
Can I reverse the conversion?
Yes - run gpg --dearmor < file.asc > file.gpg to go back to binary.
Does Kleopatra handle armoring in its GUI?
No - armoring a raw .gpg file requires the GnuPG command line; Gpg4win installs it alongside Kleopatra.