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Open source Open source alternatives to JavaScript Tools →
About the startup
JSTools.Space is a free, privacy-first platform containing focused utilities for common development tasks. It helps developers format and validate JSON, HTML, CSS, XML, and Markdown; encode Base64 and URLs; inspect JWTs; generate passwords, API keys, UUIDs, hashes, salts, nonces, TOTP secrets, and other authentication values; compare text; query structured data; and prototype HTML, CSS, and JavaScript. Most processing happens directly inside the browser, so users do not need to upload code, credentials, tokens, or test data to an application server. No account or project setup is required. The platform also includes a configurable Dummy Data Library, practical documentation, a developer security blog, the JSTools JSON Inspector Chrome extension, and the cross-platform JSON Studio desktop application.
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Media about Development & IT
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Founder stories from Development & IT startups
See all →Retold founder accounts from startups in the same category, each linked to the original.
| Story |
|---|
Tailwind UI's $2 million was five months of a commercial product, not a URL typoAdam Wathan's August 2020 essay says Tailwind CSS had about 10 million installs and that Tailwind UI, then about five months old, was about to cross $2 million in revenue, figures he stated himself beside a slug that mis |
ScreenshotOne took three years to $10k MRR and eight months to $20kDmytro Krasun says ScreenshotOne reached $10k monthly recurring revenue in September 2024, almost three years after launch, then $20k in June 2025, and that the second number changed how much more money still drove him. |
AJ said Carrd was about $1.2M ARR and he spends time on the product, not campaignsAJ told SaaS Club Carrd was about $100k MRR, about $1.2 million ARR, and that with two people he invests time in the builder rather than in finding ways to market it; he did not, in the sources fetched here, state $2M AR |
WP Engine passed $100M ARR after Cohen made thirty people say they would pay $49Jason Cohen says he did not start WP Engine until 30 people said they will pay $49 a month, 20 of them did, and in January 2018 he reported the company had passed $100 million ARR and closed $250 million from Silver Lake |
Browse Development & IT categories
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Code editors & coding assistants2,532 listed products |
Website & app builders1,718 listed products |
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