All-in-One Tools Collection

A broad collection of online tools for development, AI, design, and productivity tasks.

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Convert scanned or image-heavy PDFs into Markdown with OpenDataLoader hybrid OCR, with a graceful fallback when the hybrid backend is unavailable

Open password-protected PDFs with OpenDataLoader and export them as Markdown, JSON, or text once the correct password is provided

Extract images from PDFs, match nearby captions, and generate an HTML index package using OpenDataLoader

Extract only selected PDF pages with OpenDataLoader and export the subset as Markdown, JSON, or text

Calculate the absolute value of positive, negative, or decimal numbers and explain the sign relationship

Round numbers to integers, decimal places, tens, or hundreds using a simple rounding mode selector

Count significant figures and round numbers to a target number of significant digits

Calculate square roots, check whether a value is a perfect square, and verify the squared result

Solve proportion equations of the form a/b = c/d and calculate the missing term

Simplify ratios, calculate ratio shares, and convert between ratio, fraction, and decimal forms

Add, subtract, multiply, and divide values written in scientific notation, then return standard, scientific, and engineering forms

Convert numbers between standard decimal format and scientific notation, with optional engineering notation output

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