# DEVELOPER TOOLS — Online's Tool
URL: https://onlinestool.com/developer-tools
Interactive Web: https://onlinestool.com/developer-tools

## Overview
This topic cluster contains privacy-focused utilities designed to run directly in your browser.

## Included Tools
- **[jsonformatter](https://onlinestool.com/jsonformatter)** ([Markdown](https://onlinestool.com/jsonformatter.md)): Format, beautify, validate, and minify JSON data with custom 2-space or 4-space indentation and real-time syntax error indicators.
- **[timestamp](https://onlinestool.com/timestamp)** ([Markdown](https://onlinestool.com/timestamp.md)): Convert between Unix epoch timestamps (seconds and milliseconds) and human-readable UTC/local date-time strings.
- **[jsondiff](https://onlinestool.com/jsondiff)** ([Markdown](https://onlinestool.com/jsondiff.md)): Side-by-side visual difference tool for JSON payloads, highlighting added keys, modified values, and removed properties.
- **[textdiff](https://onlinestool.com/textdiff)** ([Markdown](https://onlinestool.com/textdiff.md)): Compare two blocks of text or code with character-level and line-level difference highlighting.
- **[meta-tag-fetcher](https://onlinestool.com/meta-tag-fetcher)** ([Markdown](https://onlinestool.com/meta-tag-fetcher.md)): meta-tag-fetcher
- **[sql-to-table](https://onlinestool.com/sql-to-table)** ([Markdown](https://onlinestool.com/sql-to-table.md)): Parse SQL CREATE TABLE and INSERT statements into formatted visual tables, Markdown tables, HTML tables, and CSV exports.
- **[urlmetadata](https://onlinestool.com/urlmetadata)** ([Markdown](https://onlinestool.com/urlmetadata.md)): urlmetadata
- **[jsonvalidator](https://onlinestool.com/jsonvalidator)** ([Markdown](https://onlinestool.com/jsonvalidator.md)): Validate JSON syntax against RFC standards and explore nested objects and arrays in an interactive hierarchical tree view.
- **[telegram-chat-id](https://onlinestool.com/tools/telegram-chat-id)** ([Markdown](https://onlinestool.com/tools/telegram-chat-id.md)): telegram-chat-id

## Privacy Architecture
All tools in this cluster execute client-side in the browser using HTML5 and JavaScript APIs. Zero data is transmitted to remote servers.