All Online Tools

All free online tools from Gotokit: calculators, developer utilities, document tools, design tools, image tools, timers and more. No signup, forever free.

Calculators

Loan Calculator

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

Mortgage Calculator

Free online mortgage calculator: enter home price, down payment, rate, and term to get monthly payment, total interest, and detailed amortization schedule. Your home buying decision tool.

Online Scientific Calculator

An online scientific calculator with arithmetic, trig functions, power, base display, and keyboard input.

Online Income Tax Calculator

Estimate annual personal income tax for US, UK, France, Japan, Korea, China, Spain, and Germany with country presets and bracket breakdown.

Online BMI Body Mass Index Calculator

BMI calculator with metric and imperial units, showing BMI value, category, and healthy weight range in real time.

Unit Converter Calculator

Convert between length, weight, temperature, volume, area, time, and currency in real time with metric and imperial unit support.

Developer

Unix Timestamp Converter

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

Token/Secure Password Generator

A local secure password generator with length control, character sets, exclusion options, and strength scoring.

GotoKit Online Hash Generator

GotoKit Online Hash Generator — Enter text or drop a file to generate MD5/SHA1/SHA256/SHA384/SHA512 hashes. Live update, HMAC mode, case toggle, one-click copy. Pure browser-side computation.

JSON Formatter & Validator

A clean, branded online JSON formatter/validator powered by vanilla-jsoneditor with Advanced Mode.

Regex Tester

Online regex testing tool with real-time matching, highlight display, syntax explanation, and test case management.

Documents

Free Online Sketch-Style Chart Generator

An online roughViz.js-based sketch chart tool with 2-12 editable rows to generate bar, horizontal bar, pie, and donut charts, with SVG export support.

Markdown Online Editor

Online Markdown editor with real-time preview, GFM support, and HTML/MD export for documentation and blogs.

Image to Text (OCR)

OCR tool based on Tesseract.js, capable of extracting text from images in over 100 languages.

Free Text Case Converter

Free online text case converter. Paste text and convert to Capitalize, CamelCase, UPPERCASE, or lowercase. Results on a beautiful 16:9 canvas with copy and PNG download.

PDF Convert

GotoKit Free Online PDF to Word

Free online PDF to Word converter powered by pdf2docx engine. Upload a PDF and get back an editable Word document with paragraphs, tables, and images preserved. Also supports Word/PPT/Excel to PDF.

GotoKit Free Online PDF Compressor

Free online PDF compressor powered by PyMuPDF. Upload PDF and reduce file size significantly with three compression levels while preserving text clarity and image color.

GotoKit Free Online Image to PDF

Free online image to PDF converter powered by Pillow. Upload JPG/PNG/WebP/BMP/GIF images, drag to reorder, customize page size, fit mode and margins, and merge into one PDF.

GotoKit Free Online PDF to Image

GotoKit Free Online PDF to Image — Convert every PDF page to high-res PNG/JPG images. Thumbnail preview, click to enlarge, ZIP batch download. Adjustable DPI and format, completely free.

Design

Pantone Color Picker

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

Color Wheel Studio

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

Online Gradient Art Generator

An Art of the Gradient inspired online tool for layered radial gradients, blend modes, random generation, and one-click CSS copy.

Excalidraw Online Whiteboard

Excalidraw-powered online hand-drawn whiteboard for flowcharts, sketches, wireframes, and annotations with local browser editing and export to PNG, SVG, and .excalidraw.

Images

Online Image to Base64 Converter

An img64-inspired online image to Base64 converter with drag, drop, paste, and click upload. Outputs Data URI, CSS, HTML, and JSON formats with optional compression for quality and size. Fully browser-local.

Base64 Encoder & Decoder

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

Code to Image Generator

Carbon-inspired code screenshot tool with theme, line numbers, font and padding controls, exporting high-quality PNG in one click.

Online Multi-Platform App Icon Batch Generator

Upload a single image and the tool will automatically generate all required application icon sizes for iOS, Android, macOS, Apple Watch, and other platforms, with support for batch PNG packaging and download — all processed locally in your browser with no server upload required.

Online Image Format Converter JPG PNG WebP BMP GIF

Free online image format converter supporting bidirectional conversion between JPG/PNG/WebP/BMP/GIF. Drag, drop, or Ctrl+V paste--no software install needed.

Ultra High Compression Online Image Compressor

A Squoosh-inspired browser-local image compressor with JPG/WebP/PNG output, quality control, and scaling to reduce image size quickly.

Timers

Countdown Timer

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

Cool Flip Clock

Cool flip clock with clock, stopwatch, and countdown modes. 3D flip animation perfect for events, OBS, and dashboard displays.

Free Online Schedule Calendar Manager

Local-first online schedule calendar. Monthly view, event CRUD with 7 tags, all data in localStorage. Download as image with watermark, fullscreen, favorite, and share.

Media

M3U8 Online Player

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

Online Artistic QR Code Designer

An artistic QR code designer powered by qr-code-styling with dot styles, corner styles, center logo, transparent background, and PNG/SVG export.

QR Code Generator

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

Online Random Lottery Tool

Frontend rolling lottery tool with custom prize, winner count, participant import, result export, and local storage history for campaigns and events.

Online Random Number Rolling Lottery Tool

Three-digit rolling number lottery tool with acceleration and staggered deceleration, ideal for live event number draws.

Astrology

AI Image

Free Online Image to Text

Shundu OCR: a minimalist online image-to-text tool. Drag & drop, choose a language, and extract copyable plain text in seconds.