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Format, generate and debug without leaving the tab

JSON formatting, CSS gradients and shadows, colour conversion, timestamps, Base64 and hashing — the utilities you open twenty times a day.

  • Payloads never leave the browser
  • Copy-ready output
  • Dark mode throughout

Safe enough for production payloads

Pasting a production API response into a random online formatter is a real data-leak vector, and most developers do it anyway because the alternative is slow. Our formatter parses and pretty-prints entirely in the browser, so an object full of customer emails or bearer tokens is never transmitted. Invalid JSON is reported with the exact position of the problem instead of a generic failure message.

The CSS generators output code you can paste straight into a stylesheet or a Tailwind arbitrary value, with a live preview beside the controls so you are not guessing at blur radius or gradient stops. Colour conversion moves between HEX, RGB, HSL and named values, and the timestamp converter handles both seconds and milliseconds across time zones — including the Asia/Dhaka offset, which most Western tools get wrong.

How it works

  1. 1

    Paste your input

    JSON, a colour value, a timestamp or a Base64 blob — whatever you are debugging.

  2. 2

    Adjust the controls

    Indentation, colour space, blur, spread or encoding direction, with a live preview.

  3. 3

    Copy the result

    Output is formatted ready to paste into your editor. Nothing is stored.

Why NeedTools

No payload leaves the tab

Safe to use with real API responses that contain tokens or personal data.

Zero latency

Everything is synchronous JavaScript, so results appear as fast as you type.

No telemetry on your input

We never record what you paste, and there is nothing to subpoena later.

Unmetered

Use them all day. There is no request budget on client-side tools.

FORMATTING

CSS TOOLS

TIME & DATES

TEXT

Keep this page bookmarked

Every developer utility below is free, private and available without an account.

FAQs About NeedTools' Developer Tools

Absolutely. When you paste JSON data into our formatter, it is processed entirely on your local machine. No data is sent over the internet.
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