
JSONFormatter.org
OnlineDeveloperTool
DevCrate
JSONLint
JSON Formatter & Validator
CodeBeautify
DevsBox
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.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | dev-toolbox.io | asocks.com |
| Pricing | ||
| Platforms | ||
| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


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;...
ASocks is a provider of qualitative and fast proxy servers with their own infrastructure. We offer you real residential proxies at the lowest price: 3$ per 1 GB.
What each product offers, as listed by its team.


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


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


As answered by people managing Dev-Toolbox.io and ASocks.
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.
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.
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.
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.
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.
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External articles and on-site reviews we used to compare the two products.


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I have worked with many services that provide proxies, but asocks stands out among them. Responsive support managers, user-friendly interface, nice prices. I am very happy!
Good service with loads of countries to choose from, very inexpensive compared to other providers, I like that you pay as you go, no need for expensive subscriptions. If you need a proxy from time to time Asocks is...
I have used other services before but that service is just amazing. Great support + amazing options on the website how to create individual proxy. I just can recommend this service to anyone.
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