Gotokit: a collection of online tools including calculators, developer utilities, and more.

M3U8 Online Player

M3U8 Online Player

Online M3U8 video player powered by hls.js, supporting HLS streaming, M3U8 URL parsing, and quality switching.

Loan Calculator

Loan Calculator

General loan calculator supporting amortized loan, deferred payment loan, and bond face value calculations.

Mortgage Calculator

Mortgage Calculator

Online mortgage calculator supporting loan amount, interest rate, and term inputs to calculate monthly payment, total interest, and amortization schedule.

Countdown Timer

Countdown Timer

Lightweight countdown tool with target datetime, quick-now fill, pause/resume control, and end notifications.

Pantone Color Picker

Pantone Color Picker

Pick colors online and match nearest Pantone references with HEX/RGB outputs, copy actions, and quick search links.

Unix Timestamp Converter

Unix Timestamp Converter

Convert between Unix timestamps and local datetime with seconds/milliseconds support and one-click current time fill.

Color Wheel Studio

Color Wheel Studio

An iro.js powered color picker with color wheel interaction, HEX/RGB/HSL/HSV outputs, copy actions, and palette slots.

Color Wheel Studio

Color Wheel Studio

An iro.js powered color picker with color wheel interaction, HEX/RGB/HSL/HSV outputs, copy actions, and palette slots.

Base64 Encoder & Decoder

Base64 Encoder & Decoder

Online Base64 encoder/decoder with text and file support, image preview, and local processing in your browser.

QR Code Generator

QR Code Generator

A QR code generator based on qr-creator with text, size, error correction, radius, color controls, and PNG download.

QR Code Generator

QR Code Generator

A QR code generator based on qr-creator with text, size, error correction, radius, color controls, and PNG download.