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Data & Reference Tools

Explore 12 free Data and reference tools for timestamps, timezones, charts, reference lookups and browser media. The collection is organized for students, analysts and general users and focuses on converting, organizing and understanding reference information.

What you can do with Data & Reference tools

Students, analysts and general users can use these tools from their dedicated pages. Each tool includes its purpose, instructions, result guidance and links to closely related utilities.

Choose a tool by name or filter the category. For calculations, verify units and assumptions before relying on the result. For text, document, web and diagnostic tools, review generated output before using it in production, publication or formal decisions.

12 free toolsDedicated pagesMobile friendlyNo registration required
Browse by level
Levels are discovery guides, not formal academic classifications.

Calculators & Analysis

1 tools
Data & ReferenceBasic

Time Zone Offset Difference

Calculate time zone offset difference from the values you enter.

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Checks & Diagnostics

3 tools
Data & ReferenceBasic

Universal Code Validator

Validate Luhn numbers, EAN-13, ISBN, ISSN and basic IBAN structure.

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Data & ReferenceIntermediate

HTTP Status Code Lookup

Look up common HTTP status codes and their meaning.

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Data & ReferenceIntermediate

MIME Type Lookup

Look up common MIME types by file extension.

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Converters & Formatters

1 tools
Data & ReferenceBasic

Timezone Converter

Convert a date and time between IANA time zones using the browser.

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Data & Reference

2 tools
Data & ReferenceBasic

Billboard Chart Search Helper

Build targeted chart-history searches for Billboard Hot 100 artist, title or date research.

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Data & ReferenceBasic

This Day in History

Look up historical events for a selected date using a public encyclopedia endpoint when available.

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General Utilities

2 tools
Data & ReferenceIntermediate

Screen Video Recorder

Record a screen, application window or browser tab and download the recording.

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Data & ReferenceBasic

Unicode Character Inspector

Inspect Unicode code points, decimal values and UTF-8 byte values.

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Generators & Builders

1 tools
Data & ReferenceIntermediate

Graph & Chart Maker

Create a downloadable bar or line chart from labels and values.

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Writing & Content

2 tools
Data & ReferenceIntermediate

Pet First Aid Reference

View general emergency first-aid reminders for pets and when to contact a veterinarian.

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Data & ReferenceBasic

Plant Hardiness Zone Reference

Map average annual minimum temperature to a USDA-style hardiness zone.

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