Online Tools - Simple, Practical & Free Online Tools

Calculation Tools

Parallelogram Perimeter Calculator

Calculate the perimeter of a parallelogram using two adjacent side lengths

Parallelogram Area Calculator

Calculate the area of a parallelogram using side length and height

Area of a Trapezoid Calculator

Online Tool for Calculating Trapezoid Area

Square Number Calculator

Calculate the Square of a Number Online

Screen PPI Calculator

Calculate PPI parameter online using screen width and height

Online Calculator

A convenient and efficient online calculator, free to use

Sphere Surface Area Calculator

Calculate the surface area of a sphere online using its inner radius

Sphere Volume Calculator

Calculate the volume of a sphere online using its radius

Hemisphere Volume Calculator

Calculate the volume of a hemisphere online using the inner radius of a sphere

Hemisphere Curved Surface Area Calculator

Online Calculation of Hemisphere Curved Surface Area

Hemisphere Surface Area Calculator

Calculate the total surface area of a hemisphere online using the inner radius of a sphere

24 Game Solver

Online 24-Point Game Calculator

Absolute Value Calculation

Online Absolute Value Calculation Tool

Cuboid Volume Calculator

Online Cuboid Volume Calculation

Volume of a Cylinder Calculator

Calculate the volume of a cylinder using its inner radius and height

Photo & Color

Image Rotation

Online batch image rotation, supports 90°, 180°, 270° rotation

Image Flip

Online batch image flipping tool with vertical and horizontal flip options

Image to Base64

Convert images to Base64 encoding online

Base64 to Image Converter

Online tool to convert Base64 encoded images to image files

Text Tools

Batch Text File Creation

Online batch creation of text files with pack and download

PDF Tools

PDF to Image Converter

Convert PDF files to images online and download as a package

Extract Images from PDF

Online batch extract images from PDF files and download as a package

Image to PDF File

Convert uploaded images to PDF files online

Extract Single Page from PDF

Extract specified single pages from a PDF file into individual PDF files online

PDF Page Custom Reordering

Customize the order of pages in a PDF file online. Free to use, no download required.

Merge Multiple PDF Files

Merge multiple PDF files into a single PDF online with customizable order

PDF File Splitting

Split pages from PDF files online and create new PDF documents

PDF Page Removal

Delete unwanted pages from PDF files and generate new PDF documents

PDF Multi-Page to Single Page

Merge all pages of a PDF file into one long single page online and generate a new PDF file

PDF Metadata Extraction

Extract and display metadata information from PDF files

PDF Metadata Setting

Set custom metadata for PDF files online, including modifying author, description, subject, and modification date

PDF to Image Conversion

Convert PDF pages to images online and generate a new PDF file

Add Page Numbers to PDF

Add page numbers to PDF files online with customizable text position, size, and color

Adjust PDF Page Size

Resize PDF pages online, set to A4 size or custom size

Remove Images from PDF

Delete images in PDF files online to reduce file size

Development Tools

Gzip Compress/Decompress

Online GZIP compression and decompression for text content

Base64/Hex Conversion

Online tool for mutual conversion between Base64 encoding and hexadecimal

Base64 Encode/Decode

Online free tool for encoding and decoding Base64 format content

Online Extraction Tool

Online zip, rar, tar compressed file extraction

Online Pack and Compress Files

Pack and compress multiple local files into a ZIP archive

Json to Cookie

Online conversion of JSON format data to Cookie format data

Online Cookie to JSON Converter

Convert cookie strings to JSON format online

PHP Array to JSON

Online convert PHP array variables to JSON format data

PHP Online Serialization Tool

Online Serialization for PHP Arrays/JSON Files

JSON to PHP Array Converter

Online JSON to PHP Array Conversion Tool

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