BLACKBAR
FIG. 01LINUX
SCREENSHOT
REDACTION

Redact secrets from screenshots. Native on Linux.

Blackbar finds IPs, hostnames, API keys, JWTs, hashes and connection strings in a screenshot and destroys the pixels — not a blur you can undo, an opaque burn into a fresh bitmap with every scrap of metadata stripped. Runs entirely on your machine. No account, no telemetry, no network calls.

Download AppImage ↳ .deb for Debian / Ubuntu
14-day trial · x86_64 · AppImage runs on any distro · $19 to keep
FIG. 02ON DEVICE
§ 01 BLACKBAR ON LINUX

Seven secrets, boxed in one pass.

Consistent session pseudonyms — the same value becomes the same label ([IP-1], [HOST-1], [AWSKEY-1]) across every screenshot in a report.

Blackbar on Linux detecting seven secrets in a terminal screenshot
FIG. 03THE BURN
§ 02 BEFORE / AFTER
Raw terminal with credentials
Beforelooted creds.txt
Same terminal with every secret burned to a labeled black bar
Afterpixels destroyed, metadata stripped
FIG. 04GUARANTEE
§ 03 OFFLINE, VERIFIABLE
  • The AppImage bundles its OCR models and fonts — it opens no sockets and needs no runtime downloads.
  • Exports overwrite pixels in a fresh opaque bitmap and strip all EXIF/XMP/metadata — the original is unrecoverable.
  • Blur and pixelate are flagged reversible and never applied to a secret without an explicit confirmation.
  • Same 27 detectors, redaction engine and session pseudonyms as the macOS app — verified against one shared test corpus.
  • One offline Ed25519 license activates both Linux and macOS — the same emailed code.
FIG. 05INSTALL
§ 04 TWO WAYS TO RUN

AppImage or .deb.

The AppImage is a single self-contained file — download, mark executable, run. Nothing to install; works on any modern x86_64 distribution.

# AppImage — any distro
chmod +x Blackbar_1.0.0_amd64.AppImage
./Blackbar_1.0.0_amd64.AppImage

# Debian / Ubuntu 22.04+
sudo apt install ./Blackbar_1.0.0_amd64.deb
Download AppImage Download .deb ↳ also on macOS
FIG. 5BVERIFY
§ 4B CHECK WHAT YOU DOWNLOADED

Every release ships a SHA-256 manifest and a GPG signature. Confirm your download is intact and really came from us.

# fetch the manifest, signature and key
curl -O https://dl.getblackbar.com/SHASUMS256.txt
curl -O https://dl.getblackbar.com/SHASUMS256.txt.asc
curl -O https://dl.getblackbar.com/blackbar-signing-key.asc

# check the hash, then the signature
shasum -a 256 -c SHASUMS256.txt
gpg --import blackbar-signing-key.asc
gpg --verify SHASUMS256.txt.asc SHASUMS256.txt

Signing key fingerprint 69DF BA36 B149 7CE8 45A0  0091 4779 4781 CF58 7E79 · full details on the Security & Privacy page.