
iLovePDF
Adobe Acrobat DC
Sejda
PDF24
CloudConvert
TinyWow
PDF24 PDF Creator
PDF document management and conversion suite

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, Smallpdf seems to be more popular. It has been mentioned 38 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | smallpdf.com | yamlvalidator.dev |
| Pricing | — | |
| Platforms | — | |
| Company | — | 2024 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Smallpdf 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
Recommended for
Walkthroughs and reviews on video.
smallpdf tutorial video
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Smallpdf 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 Smallpdf and YAMLValidator.dev. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Smallpdf is a well-known online PDF platform with a clean interface. It works entirely in the browser and integrates with Google Drive and Dropbox, making it convenient if you store files in the cloud. The free tier...
Users highlight Docpose.cloud’s reliability—no failed conversions even on rare formats. CloudConvert gets praise for quality tweaks but frustrates with daily resets. iLoveIMG is loved for extras like AI, but free...
Platforms like iLovePDF and Smallpdf are among the most popular choices. They do a decent job for simple PDFs, but I quickly realized a few issues:
We have no reviews of YAMLValidator.dev yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


According to statistics from smallpdf.com, by 2025, there will be a massive 2.5 trillion PDF documents stored worldwide, and 290 billion new PDF documents will be created every year. - Source: dev.to / 9 months ago
Smallpdf [1] probably deserves a mention here. Not OSS and not self-hosted, but I‘ve used it occasionally and it has always worked really well. When I was running an agency, we inherited their first office – very cool folks. [1]... - Source: Hacker News / over 2 years ago
And use this one to merge two single-page pdf to make a double side page. Source: almost 3 years ago
Tracking YAMLValidator.dev since Apr 2026.
When comparing Smallpdf and YAMLValidator.dev, you can also consider the following products.


Yamline offers a suite of online YAML tools, including a Comparator, Formatter, Validator, and various converters for formats like JSON and Properties.
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Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
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ValidKube combines the best open-source tools to help ensure Kubernetes YAML best practices, hygiene & security.
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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.
Compare yamlfmt to Smallpdf or YAMLValidator.dev: