YAMLValidator.dev
YAMLine
ValidKube
yamlfmt
YAML
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KuberLogic
eM Client
Thunderbird
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Evolution
YAML Validator is a free, privacy-first tool for validating, formatting, and viewing YAML files โ available as a Chrome extension and a website.
---Paste or type YAML into the editor. YAML Validator auto-detects the schema (e.g., spots apiVersion + kind and picks Kubernetes) and validates both syntax and structure in one click. If the detected schema doesn't match, it suggests the right one with a single-click switch.
Everything runs client-side โ your files never leave your machine. No accounts, no server processing, no data collection. Works offline, loads instantly.
Whether you're writing Kubernetes manifests, debugging a CI pipeline, or reviewing a Helm chart on GitHub โ YAML Validator catches errors before they reach production. The Chrome extension currently has around 800 users worldwide.
Available in 54 languages.
โ all major services supported (including Gmail, Exchange, iCloud, and Outlook365) โ automatic set up for most email services โ simple and fast data import from all major email apps (including Microsoft Outlook, Outlook Express, Windows Mail, Thunderbird, Incredimail and more). โ touch support for touch-enabled laptops, tablets and hybrid devices โ super-fast search that finds any email, contact or attachment in seconds โ Online Meetings support (for Zoom, MS Teams, Google Meet) โ unique email features, such as Watch for Reply, Snooze Email, or Send Email Later โ the interface is customizable in the most comprehensive way on the market (including custom themes and an advanced visual Theme Editor)
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YAMLValidator.dev's answer
It validates YAML against real schemas โ generic YAML, Kubernetes, Docker Compose, GitHub Actions, GitLab CI, Helm, OpenAPI, and more โ not just syntax checking. Everything runs client-side, so your config files never leave your machine. It works both as a Chrome extension (with GitHub integration for collapsible code blocks) and as a standalone website.
YAMLValidator.dev's answer
DevOps engineers, SREs, and backend developers who work with Kubernetes manifests, Docker Compose files, CI/CD pipelines (GitHub Actions, GitLab CI, CircleCI, Azure Pipelines), Helm charts, and OpenAPI specs. Anyone who edits YAML config files and wants instant validation without leaving the browser.
YAMLValidator.dev's answer
I am software engineer and extension(and lately site) was made out of frustration with debugging YAML indentation errors in CircleCI schemes and Kubernetes deployments. A misplaced space in a YAML file can break an entire deployment, and generic text editors don't catch schema-level mistakes. YAML Validator was built to catch those errors before they reach production โ directly in the browser, with zero setup.
YAMLValidator.dev's answer
JavaScript/TypeScript, CodeMirror (editor), js-yaml (parsing), Ajv (JSON Schema validation), Lit (web components), and Tailwind CSS. Built as a Chrome Extension (Manifest V3) with Vite as the bundler. Schemas are pre-compiled at build time for performance and CSP compliance
YAMLValidator.dev's answer
YAML Validator is a free, open-use tool โ it doesn't track users or require accounts. It's used by individual developers and teams working with Kubernetes, Docker, and CI/CD pipelines. As a privacy-first browser tool, there's no customer list by design. The browser extension currently has around 800 users worldwide.
YAMLValidator.dev's answer
There's simply no other Chrome extension that does this. Most online YAML tools are web-only, require an internet connection, and only check syntax. YAML Validator runs entirely offline, validates against 11+ schemas with auto-detection (Kubernetes, Docker Compose, GitHub Actions, and more), and enriches GitHub with collapsible code blocks for YAML files. It's fast, private, and requires zero setup โ install and go.
Based on our record, eM Client seems to be more popular. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Also, if you're also trying to use Xtra email in Microsoft Outlook, also expect problems. Outlook is also crap. There are other email application options. Em Client (emclient.com) is an excellent alternative to Outlook. Source: almost 3 years ago
Totally agree on the security risk. On the other hand setting up, maintaining and explaining PGP for non-technical users usually leads to not using encryption at all, which is by far less secure than a self-managed PGP gateway on a private mail server setup. I'm aware of the few UX friendly implementations like eM client or pEp, but even those are for most not easy or "automatic" to use. (especially without good... Source: over 4 years ago
I use EmClient for my email/calendar on Windows desktop. Source: over 4 years ago
There is Thunderbird email client (Free) and Em Client (free for 2 email addresses) as well. Source: over 4 years ago
YAMLine - Yamline offers a suite of online YAML tools, including a Comparator, Formatter, Validator, and various converters for formats like JSON and Properties.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
ValidKube - ValidKube combines the best open-source tools to help ensure Kubernetes YAML best practices, hygiene & security.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
yamlfmt - An extensible command line tool or library to format yaml files. - GitHub - google/yamlfmt: An extensible command line tool or library to format yaml files.
Microsoft Outlook - Organize your world. Outlookโs email and calendar tools help you communicate, stay on top of what matters, and get things done.