Open-source developer tools

Tools for configuration and certificate work

GMM ships focused extensions for VS Code and JetBrains IDEs. Each product has a public repository, a marketplace release, and a narrowly defined job.

VS Code extension

HAProxy Config

Version-aware HAProxy configuration validation, completion, hover documentation, formatting, and navigation inside VS Code.

  • Version-aware diagnostics for HAProxy 2.4 through 3.4, including deprecated and unavailable directives
  • Context-aware completion, hover documentation, snippets, quick fixes, formatting, folding, and symbols
  • Definition, reference, highlight, and rename support for configuration relationships

v0.6.0 · 248 installs as of 2026-09-29

VS Code extension

CertView for VS Code

Inspect certificates, chains, CSRs, CRLs, PKCS#7, PKCS#12, keys, and JWK files locally in VS Code without telemetry or uploads.

  • Certificate identity, validity, fingerprints, key metadata, extensions, chains, CSRs, CRLs, and advisory lint findings
  • Local PKCS#7 and PKCS#12 inspection plus public, private, encrypted-key metadata, and JWK views where supported
  • A bounded workspace explorer with configurable file limits, exclusions, and automatic refresh

v0.5.0 · 210 installs as of 2026-09-29

JetBrains plugin

CertView for JetBrains

Inspect X.509 certificates and Java keystores inside IntelliJ-based IDEs, with bounded local parsing and explicit validation limits.

  • Dedicated viewers for local PEM, DER, CRT, and CER certificate files
  • Password-prompted inspection of PKCS#12/PFX, JKS, and JCEKS keystores
  • Subject, issuer, serial number, validity, certificate metadata, and keystore entry inspection inside the IDE

v1.0.35 · 5,554 downloads as of 2026-09-29