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Focused tool collection

Developer and Data Tools

Inspect, transform and generate code and data privately with bounded parsers and standards-based output.

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Each page explains its method, limitations, privacy behaviour and review evidence before you rely on the output.

Developer and Data

JSON Formatter and Validator

Validate, format or minify JSON locally, with clear syntax errors and a guard against oversized input.

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Developer and Data

Base64 Encoder and Decoder

Encode Unicode text to Base64 or decode valid Base64 back to text locally, with strict malformed-input checks.

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Developer and Data

URL Encoder and Decoder

Encode text as a URL component or decode percent-encoded text locally, with clear errors for malformed sequences.

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Developer and Data

UUID Generator

Generate one or many RFC 9562 UUID version 4 identifiers locally using the browser's cryptographically secure random source.

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Developer and Data

Unix Timestamp Converter

Convert Unix timestamps in seconds or milliseconds to an ISO date, with explicit unit detection and supported-date validation.

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How this collection is organised

Tools share tested engines where the underlying method is the same. Universal methods remain globally useful; jurisdiction-specific tools say clearly when South African rules apply.

Browse the complete Great Future Tools directory if your task belongs to another collection.

Across Great Future

Tools work better with clear guidance

Money guidesPay, debt and savingHome & propertyBuying and household costsBusiness guidancePricing and invoicingCareerApplications and pay decisionsStudyMarks and academic planningTemplatesCreate useful documentsSearch Great FutureFind a specific taskMethodologyMethods, sources and limits