Calculators
Transfer time, connection speed and bandwidth calculations with explicit units.
View calculators →Web / Data / Developer utilities
Get the answer. Keep moving.
Straightforward tools for transfer math, data conversion, JSON and everyday development work. No account, no unnecessary trip to a server.
12 working utilities
Find the right tool
Calculator
Download Time Calculator
Compare theoretical and practical download estimates.
DataJSON Formatter
Format or minify JSON and pinpoint syntax errors.
CalculatorMbps ↔ MB/s Converter
Move between network and file transfer rate units.
DeveloperUnix Timestamp Converter
Convert epoch seconds or milliseconds to readable dates.
CalculatorBandwidth Calculator
Find required bandwidth or transferable data capacity.
DataData Storage Converter
Convert decimal SI and binary IEC storage units correctly.
DataJSON Validator
Check JSON syntax with line, column and position details.
DeveloperUUID v4 Generator
Generate one or a batch using the browser's secure API.
CalculatorFile Transfer Time Calculator
Estimate movement time across bit- or byte-based rates.
DataBase64 Encoder / Decoder
Encode or decode UTF-8 text without sending it away.
DeveloperURL Encoder / Decoder
Encode Unicode and reserved characters for URL components.
DeveloperText Case Converter
Switch text between practical capitalization styles.
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Grouped by task
Three focused categories
Data tools
Storage conversion, JSON work and text-safe Base64 operations.
View data tools →Developer tools
Timestamps, UUIDs, URL components and common text transformations.
View developer tools →No accountOpen a tool and use it.
Browser-sideInputs stay on your device.
Dependency-freeNo third-party app code.
Clear unitsAssumptions stay visible.