About

Browser-based tools for practical development data tasks.

Developer Data Tools is an API payload debugging workspace for developers, data analysts and technical teams who need focused utilities for inspecting copied responses, encoded values, timestamps, hashes and request metadata.

Why this site exists

Most debugging starts with a piece of data copied out of a log, a network panel or a failing request. The site focuses on the small, repetitive checks that surround that data: is the JSON valid, is the value encoded, is the timestamp in seconds or milliseconds, does the status code match the symptom. Each tool stays close to a real debugging task rather than acting as a broad directory of unrelated utilities.

What it covers

The toolset is organized around the data you actually paste in while debugging, not around tool categories for their own sake.

Area JSON & structure

Format, validate and compare API responses, configs and webhook payloads.

Area Encoding

Decode Base64, URL values and HTML entities in the browser.

Area Time

Convert timestamps and catch seconds-vs-milliseconds and timezone mistakes.

Area Crypto & integrity

Generate hashes and test browser-based encryption workflows carefully.

Area Request metadata

Parse user agents and look up status codes, MIME types and cron syntax.

Area Text

Compare logs, snippets and configs and test regular expressions.

How it is built

A few principles keep the tools predictable and trustworthy.

Principle Local by default

Tool input is handled in the browser and is not saved by this site.

Principle Context over noise

Each tool page pairs the workspace with debugging notes, common mistakes and related references.

Principle Honest about limits

Security-sensitive pages explain practical limits instead of implying tools are a substitute for proper review.

Who it is for

Anyone who regularly inspects raw development data: backend and frontend developers tracing API issues, data analysts checking exported payloads, and support or QA engineers reproducing a reported bug. If you keep a browser tab open just to format JSON or decode a value, this site is meant to be that tab.

Developers debugging broken responses, encoded values and timestamps.
Analysts and QA verifying exported or copied data before filing a report.
Teams that prefer browser-based tools that do not save pasted input.

Tool input is processed in your browser and is not saved by this site. Privacy, cookie and terms pages are linked from every page footer.