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Photo Size to Pixels Converter

Quickly convert common photo and paper sizes to pixel dimensions by specifying the DPI. Perfect for printing, graphic design, and layout planning.

Annulus Area Calculator

Quickly calculate the area of an annulus by entering the inner and outer radii. Ideal for math education and engineering drafting.

Passport & ID Photo Maker

AI ID photo generator with precise background removal. Supports international standard sizes and custom parameters with secure local processing.

Regular Pentagon Area Calculator

Calculate the area of a regular pentagon based on its side length, perimeter, or diagonal. Ideal for math studies and engineering calculations.

Triangle Area Calculator

Calculate the area of a triangle using base and height, two sides and the included angle, or Heron's formula. Ideal for math studies and engineering measurements.

Image People Counter

Use AI to count the number of people in an image. Supports JPG/PNG uploads and image resizing for accurate counting results.

Rectangle Area Calculator

Enter the length and width to automatically calculate the area of a rectangle. Ideal for math learning and engineering measurements.

Blind Watermark Detector

Detect and extract invisible blind watermarks from images. Supports PNG/JPG formats and preprocessing scaling.

Square Area Calculator

Quickly calculate the area and perimeter of a square by entering its side length. Ideal for students and engineering tasks.

Business Card Size to Pixels Converter

Convert physical business card dimensions to pixel values. Supports custom DPI settings for both print design and screen display scenarios.

Add Invisible Watermark to Image

An invisible digital watermarking solution for PNG and JPG images to effectively protect your copyright and prevent image theft.

Regular Polygon Area Calculator

Enter the number of sides and side length to quickly calculate the area of any regular polygon. Ideal for geometry students and engineering calculations.

GIF Splitter

Split GIFs frame by frame online and quickly export high-quality static images.

Rhombus Area Calculator

Enter the diagonal lengths of a rhombus to automatically calculate its area. Ideal for math studies and engineering measurements.

Letter Icon Generator

Input text to quickly generate circular or rounded square letter icons suitable for website icons, avatars, UI elements.

Line Chart Generator

Free online line chart maker. Input your data to instantly generate custom line graphs. Customize titles, colors, and download as PNG to visualize trends.

GIF Maker

Convert images or videos to animated GIFs online for free. Supports custom cropping, frame rate adjustments, and secure local processing.

Kite Area Calculator

Quickly calculate the area of a kite using the lengths of its two diagonals. Ideal for students, teachers, and designers.

SVG to PNG Converter

Quickly convert SVG vector graphics to high-resolution PNG images online. Supports custom dimensions.

JPG to ICO Converter

Free online JPG to ICO converter. Easily convert JPG images into multi-size ICO files containing up to 6 different dimensions for favicons and desktop icons.