
Facebook for Business
SocialPilot
Fomo
Buzzstream
PostPlanner
SocialXpand
RiteTag
Smartly.io is the leading Facebook ad optimization solution for agencies and performance marketers

YAMLine
ValidKube
yamlfmt
YAML
JSON to YAML
JSON Formatter & Validator
KuberLogic
Validate YAML syntax and schemas for Kubernetes, Docker Compose, GitHub Actions, and more. Free, private, runs entirely client-side (browser extension and website).
Which is more popular?
Based on our record, Smartly.io seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | smartly.io | yamlvalidator.dev |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from Finland · 250 - 499 employees · 2013 | 2024 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Smartly.io yet.
YAML Validator is a free, privacy-first tool for validating, formatting, and viewing YAML files — available as a Chrome extension and a website. What it does Syntax validation — catch indentation errors, duplicate keys, and malformed YAML instantly Schema validation — validate against 11+...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
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Walkthroughs and reviews on video.
How to Automate Facebook Advertising at Scale - Smartly.io
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As answered by people managing Smartly.io and YAMLValidator.dev.
YAMLValidator.dev's answer:
It validates YAML against real schemas — generic YAML, Kubernetes, Docker Compose, GitHub Actions, GitLab CI, Helm, OpenAPI, and more — 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 — 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 — 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 — install and go.
Share your experience with using Smartly.io and YAMLValidator.dev. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


- Experience with PowerPoint, Excel (pivot tables and common formulas), and Microsoft Office. Experience using Smartly.io a plus. Source: about 4 years ago
Tracking YAMLValidator.dev since Apr 2026.
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