CodeFactor.io
JSLint
Codacy
ESLint
Coala
textlint
Prettier
Online Javascript Validator validates javascript code and find errors and warnings that can be fixed. See real time validation of your javascript code as you type.

Hasare
DevSolvev2
IT Tools
Ahrefs
DevToys
FreeToolkit
10015.io
Free 55+ developer tools — JSON formatter, PHP obfuscator, code beautifier, QR generator, hash tools & more. No signup, no limits.
Which is more popular?
Based on our record, Javascript Validator seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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JV
Javascript Validator
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|---|---|---|
| Website | beautifytools.com | aether-tool.com |
| Pricing | — | |
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Javascript Validator yet.
Free 55+ developer tools — JSON formatter, PHP obfuscator, code beautifier, QR generator, hash tools & more. No signup, no limits.
What each product offers, as listed by its team.

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

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HOW TO GET A FREE AETHER TOOL AND CRYSTAL ON RECKONING (side easter egg)
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How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing Javascript Validator and Aether Tool.
Aether Tool's answer:
Aether Tool consolidates over 50+ essential developer utilities into a single, lightning-fast, and minimalist web interface. Unlike other platforms that fragment tools across multiple sites or bury them under premium paywalls, Aether Tool provides everything—from JWT decoding and JSON formatting to CSS generation and SVG optimization—in one unified, frictionless experience.
Aether Tool's answer:
Speed and an absolute lack of friction. Most competitors clutter their tools with aggressive advertisements, require account registrations, or hide essential features behind paid subscriptions. Aether Tool is 100% free, requires zero sign-ups, loads instantly, and respects user privacy. It’s built purely for developers who want to get the job done quickly without distractions.
Aether Tool's answer:
Aether Tool is built using modern web technologies to ensure fast performance. The frontend leverages lightweight JavaScript and optimized CSS for a highly responsive UI. Many of the tools run entirely client-side for maximum privacy and zero-latency execution, ensuring sensitive data (like passwords or tokens) never leaves the user's browser.
Aether Tool's answer:
The primary audience includes web developers (both frontend and backend), software engineers, system administrators, UI/UX designers, and technical SEO specialists. It is also highly valuable for computer science students and indie hackers who need quick, reliable utilities for daily coding and formatting tasks.
Aether Tool's answer:
Aether Tool was born out of pure developer frustration. I was tired of having 15 different websites just to format a JSON file, test a Regex pattern, generate a secure UUID, and compress an SVG. Constantly googling for these disjointed, ad-heavy mini-tools broke my flow state. So, I decided to build the ultimate "Swiss Army knife" to house every essential utility in one clean, centralized, and fast platform.
Aether Tool's answer:
Since Aether Tool is a completely free, privacy-focused utility platform rather than enterprise B2B software, we don't track corporate client data.
Share your experience with using Javascript Validator and Aether Tool. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Try pasting your code into a validator to see if you don't have a typo somewhere: https://beautifytools.com/javascript-validator.php. Source: over 4 years ago
So everything works fine the way I see it and that error only comes up after a few clicks. Since I'm not a js wizard I did put your script code into a javascript validator and it looks like you're missing a couple of semi colons here and... Source: almost 5 years ago
Tracking Aether Tool since Mar 2026.
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