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A canopy of tools for the ops you actually do.

Free online developer tools that run entirely in the browser — validators, converters, testers and linters for DevOps and SRE engineers. No signup, no servers, no tracking: your data never leaves the device.

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The Catalog

Tools in the canopy.

Focused, single-purpose utilities for platform and DevOps engineers — every one live, free and running entirely in your browser.

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Tool 01 · Observability

Test your Loki alerting rules before they fire in production.

Paste your alerting and recording rules alongside synthetic log streams, then assert exactly what should — and shouldn’t — fire. The promtool equivalent Loki never shipped, running entirely in your browser.

Open AlertLint
alertlint test ./tests 
# rules.yml — the Loki alert under test
groups:
  - name: ingest
    rules:
      - alert: HighErrorRate
        expr: |
          sum(rate({app="api"} |= "level=error" [5m])) > 10
        for: 2m

# tests.yml — assert it fires (and doesn't, when quiet)
tests:
  - name: fires when errors spike
    input:
      - logs: 'level=error'
        rate: 25/min
    expect: { alert: HighErrorRate, fires: true }
  - name: stays quiet under threshold
    input:
      - logs: 'level=error'
        rate: 3/min
    expect: { alert: HighErrorRate, fires: false }
  • PRICE Free forever Every tool, no paywall, no trial.
  • RUNTIME Runs in your browser Pure client-side. Nothing to install.
  • PRIVACY Your data stays local Inputs never leave the device.
  • ACCESS No signup Open the page and start working.
The Thesis

Why build a hub, not a single tool.

One great utility is a side project. A canopy of them is a platform — each tool feeding the next with traffic, trust and reuse.

COMPOUNDING

A hub compounds.

Each focused, search-shaped tool earns its own keywords and links back to the rest. The catalog grows more discoverable with every release.

STATIC + CHEAP

Cheap to run, fast to load.

Everything is static and client-side, so there are no servers to scale and no bills to chase. Pages stay instant under any traffic.

PRIVACY

Privacy is a feature.

Your rules, configs and logs are yours. Nothing is uploaded, logged or phoned home — the whole point of running it in your tab.

Privacy

Nothing you paste leaves your tab.

Every OpsCanopy tool runs as static JavaScript in your browser. There is no backend to receive your rules, configs or logs — no uploads, no telemetry on your inputs, no account to create. Close the tab and it’s gone.

100% client-side

FAQ

Questions, answered.

Tap a question to expand the answer.

Are OpsCanopy tools really free?

Yes. Every tool is completely free with no paywalls, usage limits, or premium tiers. There is no account requirement of any kind — open a tool in your browser and start using it immediately.

Do I need to sign up to use these online DevOps tools?

No. There is no signup, login, or email capture. Open any tool in your browser tab and use it immediately — no account, no cookie consent wall, no friction.

Is my data uploaded to a server when I use the tools?

No. Every tool runs 100% client-side in your browser tab; nothing you paste is logged, stored, or uploaded. Your data never leaves the browser.

Is it safe to paste a JWT or config into a browser-based tool?

On OpsCanopy, yes. Decoding and parsing happen entirely in local JavaScript with zero server calls, which you can verify yourself in the browser network tab. As general hygiene, never share signing secrets with any third party, but OpsCanopy transmits nothing.

Do the tools work offline?

Once a tool page has loaded, it keeps working even if you disconnect from the internet, because all processing is local and there is no backend to call. Going offline is also an easy way to verify the client-side privacy claim yourself.

Who are these browser-based DevOps tools for?

DevOps engineers, SREs, sysadmins, platform and backend engineers — anyone who needs quick subnet and CIDR math, cron schedules, PromQL or LogQL queries, JWT, Base64 and hash utilities, timestamp conversion, GitHub Actions validation, or Kubernetes resource sizing without installing anything.

How is OpsCanopy different from other online developer tool collections?

Most tool collections focus on generic formatters. OpsCanopy specialises in DevOps and SRE workflows — CIDR planning, cron, PromQL and LogQL, Kubernetes capacity, CI validators — with the same guarantees throughout: free, no signup, 100% client-side, nothing uploaded or logged.

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