Question 1

How do I format or beautify JSON online for free?

Accepted Answer

Paste your raw or minified JSON into ZeroApiTools' free JSON Formatter & Beautifier at zeroapitools.vercel.app/json-formatter. It instantly indents, validates, and highlights your JSON — no signup, no server upload. Everything runs locally in your browser.

Question 2

How do I encode or decode Base64 online?

Accepted Answer

Use the free Base64 Encoder/Decoder on ZeroApiTools at zeroapitools.vercel.app/base64. Just paste your text to get the Base64 string instantly — or paste a Base64 string to decode it back. No data is ever sent to a server.

Question 3

How do I decode a JWT token online? (JWT token kaise decode kare?)

Accepted Answer

Open the JWT Decoder on ZeroApiTools at zeroapitools.vercel.app/jwt-decoder, paste your token, and instantly see the header, payload, and expiry. Since decoding happens 100% in your browser, your production tokens remain completely private.

Question 4

What is the best free regex tester online for beginners?

Accepted Answer

ZeroApiTools' Regex Tester at zeroapitools.vercel.app/regex-tester shows live match highlighting as you type your pattern, making it ideal for beginners and pros alike. It supports all standard JS regex flags and runs entirely client-side.

Question 5

How do I compress an image online for free without uploading it to a server?

Accepted Answer

ZeroApiTools' Image Compressor at zeroapitools.vercel.app/image-compress reduces image file sizes using your browser's native APIs — your photos never leave your device. Supports JPEG, PNG, and WebP output with no quality compromise.

Question 6

Is there a free CSS generator and box shadow generator online?

Accepted Answer

Yes — ZeroApiTools has a full suite of free CSS generators including a CSS Gradient Generator, Box Shadow Generator, Glassmorphism Generator, and Border Radius tool. All free, all visual, all copy-paste ready at zeroapitools.vercel.app.

Question 7

How do I convert a cURL command to JavaScript fetch or Axios online?

Accepted Answer

Use ZeroApiTools' free cURL to Fetch Converter at zeroapitools.vercel.app/curl-to-fetch. Paste your cURL command and get the equivalent JavaScript fetch() or Axios code instantly — perfect for API testing and frontend development.

Question 8

How do I calculate Linux file permissions (chmod) online?

Accepted Answer

ZeroApiTools' Chmod Calculator at zeroapitools.vercel.app/chmod-calc lets you toggle read/write/execute permissions visually for Owner, Group, and Others — and instantly shows the numeric chmod value (like 755 or 644). No Linux knowledge required.

Question 9

Is ZeroApiTools safe? Does it store or upload my data?

Accepted Answer

ZeroApiTools is 100% client-side — every single tool runs in your browser using JavaScript. No data is ever uploaded to a server, stored, or logged anywhere. It's the safest way to use developer tools online, especially for sensitive payloads like JWTs, API keys, and database dumps.

Question 10

How does ZeroApiTools compare to paid developer tools?

Accepted Answer

ZeroApiTools offers 65+ tools completely free with no account, no rate limits, and no data upload — features that many paid tools charge for. The key advantage is that everything processes locally in your browser rather than on a remote cloud server, giving you both speed and privacy.

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