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.

Base64Encode.dev
Base64Image.org
Decodebase64.io
Base64.ai
Image to Base64 Converter
Decode Tools
Encoder and Decoder
Convert images to Base64 and back, locally in your browser
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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Javascript Validator
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| Website | beautifytools.com | base64-image.org |
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What each product offers, as listed by its team.

No features have been listed yet.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Javascript Validator and Base64-Image.org. 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 Base64-Image.org since Sep 2026.
When comparing Javascript Validator and Base64-Image.org, you can also consider the following products.

Automated Code Review for GitHub & BitBucket
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Base64 Encode and Decode Online
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JSLint is a JavaScript program that looks for problems in JavaScript programs.
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Same short listing as AlternativeTo: no-upload, client-side image<->base64 with data URI / <img> / CSS output. Free, no login.
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Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
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Our Base64 Decoder converts Base64 encoded data back to its original format, including text, binary, and images. It’s a fast, free, and easy to use tool.
Compare Decodebase64.io to Javascript Validator or Base64-Image.org: