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ExtendsClass JSON Formatter VS Dev-Toolbox.io

Compare ExtendsClass JSON Formatter VS Dev-Toolbox.io and see what are their differences

ECJ
ExtendsClass JSON Formatter

ExtendsClass JSON Formatter is a tool that allows you to beautify, minify, validate, view, and escape JSON code.

Rating
0 reviews
Promote on VibeVoted
Alternatives Is it good?
Dev-Toolbox.io

30 free browser-based developer utilities: JSON formatter and diff, regex tester, JWT decoder, Base64, hashing, cron parser, YAML and CSV converters. No sign-up, and every tool runs entirely in your browser.

Rating
0 reviews
Pricing
Free
Promote on VibeVoted
Alternatives Is it good?
Modelence
Create production-ready applications with zero code sponsored

Which is more popular?

Image Optimisation popularity
100% vs 0%
alternatives listed
67 vs 26

Base details

Website, pricing, platforms and company facts side by side.

ECJ
ExtendsClass JSON Formatter
Dev-Toolbox.io
Website extendsclass.com dev-toolbox.io
Pricing —
Free
Platforms —
Web
Company — Startup from the United States · 1 - 9 employees · 2026
Listed in
Development Image Optimisation Image Editing Developer Tools +1
Developer Tools JSON Tools Online Tools JSON Formatters Free Online Tools +2

About ExtendsClass JSON Formatter and Dev-Toolbox.io

In their own words, as submitted to SaaSHub.

ECJ
ExtendsClass JSON Formatter
Dev-Toolbox.io

No description of ExtendsClass JSON Formatter yet.

DevToolbox.io is a collection of 30 developer utilities that run entirely in your browser. Formatters for JSON, HTML, CSS, SQL, XML and JavaScript; comparators for text, files and JSON; converters for YAML, CSV, colour, timestamps and number bases; encoders and decoders for Base64, URLs and JWTs;...

Read more about Dev-Toolbox.io

Features and specs

What each product offers, as listed by its team.

ECJ
ExtendsClass JSON Formatter 4 features
Dev-Toolbox.io 10 features
  • User-Friendly Interface
    The ExtendsClass JSON Formatter provides a clean and intuitive interface that is easy to navigate, making it accessible for users of all skill levels.
  • Validation Feature
    This tool offers JSON validation, allowing users to check for syntax errors and ensure their JSON data is correct.
  • Format and Minify Options
    Users can format their JSON data to make it readable or minify it to reduce size for efficient storage and transfer.
  • Free to Use
    The service is available at no cost, providing a valuable resource for developers who need to validate or format JSON data.

Possible disadvantages

  • Internet Dependency
    Since it is an online tool, it requires an internet connection, which may not be ideal for users who need to work offline.
  • Data Privacy Concerns
    Users may have concerns about uploading sensitive JSON data to an online tool due to potential privacy and security issues.
  • Limited Advanced Features
    While the tool is excellent for basic operations, it may lack advanced features offered by dedicated JSON editing software.
  • Performance Limitations
    Handling extremely large JSON files may result in slower performance or timeouts, which could hinder productivity.
  • Runs client-side
    Every tool processes input in the browser; nothing is uploaded to a server.
  • No account required
    No sign-up, no login, and no rate limits.
  • Formatters
    JSON, HTML, CSS, SQL, XML and JavaScript, with validation and error locations.
  • Comparators
    Text diff, file diff, and a structural JSON diff that compares by data rather than text.
  • Converters
    JSON to YAML, JSON to CSV, Markdown to HTML, colour, timestamp and number base.
  • Encoders and decoders
    Base64 for text and files, URL encoding, and JWT decoding.
  • Generators
    UUID, hash, password, slug and Lorem Ipsum.
  • Validators
    Regex tester, JSON Schema validator, JSONPath tester and cron expression parser.
  • Minifiers
    HTML, CSS and JavaScript.
  • Shareable links
    Share a result by link; only the output you choose is uploaded.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
ECJ
ExtendsClass JSON Formatter
Dev-Toolbox.io
100% 100%
Image Optimisation
0% 0%
0% 0%
JSON Formatters
100% 100%
100% 100%
Development
0% 0%
83% 83%
Developer Tools
17% 17%

Questions & Answers

As answered by people managing ExtendsClass JSON Formatter and Dev-Toolbox.io.

What makes your product unique?

Dev-Toolbox.io's answer:

Everything runs in your browser. Most online developer tools post your input to a server to process it, which makes them unusable for anything sensitive — API keys, access tokens, production records, client data. DevToolbox.io does the work locally, so there is nothing to upload and nothing to retain. The only thing that ever leaves the browser is a Share link you explicitly create.

Why should a person choose your product over its competitors?

Dev-Toolbox.io's answer:

Three reasons. Privacy: your input never reaches a server, so you can paste a real JWT or a production payload without thinking about it. Breadth: 30 tools in one place, so you are not bouncing between a different single-purpose site for every task. No friction: no account, no rate limits, no ads interrupting the tool, and each tool is its own URL you can bookmark or link to directly.

How would you describe the primary audience of your product?

Dev-Toolbox.io's answer:

Working software developers, and anyone adjacent to them — QA engineers, data engineers, technical support staff and students. The common thread is someone who needs to format, convert, decode or compare something quickly, mid-task, and does not want to install anything or hand their data to a third party to do it.

What's the story behind your product?

Dev-Toolbox.io's answer:

It started from the habit of searching for "json formatter" or "base64 decode" several times a week and landing on whichever ad-heavy site ranked that day, never knowing what happened to the data pasted in. DevToolbox.io was built to be the bookmark that replaces those searches: the same tools, in one place, that run in the browser and do not ask for anything.

Which are the primary technologies used for building your product?

Dev-Toolbox.io's answer:

Next.js and React with TypeScript, styled with Tailwind CSS and deployed on Vercel. The editors are Monaco, the same editor component used by VS Code. Heavier work — parsing, diffing, formatting and minifying — runs in Web Workers so a large document never freezes the page. Established parsers do the real work rather than hand-written ones: Prettier and Terser for JavaScript, the yaml library for YAML, marked for Markdown and DOMPurify for sanitization.

User comments

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Alternatives to ExtendsClass JSON Formatter and Dev-Toolbox.io

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