25+ Free, 100% Client-Side Web Tools

All the utilities you need,
securely nested in one place.

Convert documents, merge PDFs, build custom QR codes, generate invoices, format JSON, resize images, and calculate financials. All actions execute locally in your browser—we never see your files.

PDF Merger

POPULAR

Combine multiple PDF files into one single document in seconds.

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PDF Splitter

POPULAR

Split PDF files into individual pages or extract custom page ranges.

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PDF Page Organizer

Rotate, reorder, or delete specific pages visually from a PDF.

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Image to PDF Converter

Convert JPEG, PNG, WebP photos into a compiled PDF file.

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QR Code Generator

POPULAR

Create custom QR codes with adjustable colors, margins, and logos.

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QR Code Scanner

Scan and decode QR codes from your webcam or uploaded image files.

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Invoice Generator

POPULAR

Draft, customize, and print professional invoices with custom tax lines.

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Compound Interest Calculator

POPULAR

Forecast investment growth with compound intervals and charting.

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Mortgage & Loan Calculator

Calculate monthly payments and inspect amortized scheduling details.

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Tip Calculator & Splitter

Quickly split dining bills, calculate custom tip percentages.

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Discount & Tax Calculator

Find savings, final price, and added sales taxes for store products.

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Image Format Converter

POPULAR

Batch convert PNG, JPG, WebP, GIF, or SVG formats.

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Image Compressor & Resizer

Shrink image file bytes and adjust pixel width/height details.

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Color Palette Extractor

Upload an image to extract color swatches and check contrast ratios.

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CSS Gradient Generator

Design linear or radial CSS background gradient color codes.

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CSS Box Shadow Generator

Fine-tune offsets, spreads, and blurs to export shadows code.

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JSON Formatter & Inspector

POPULAR

Validate, beautify, and search JSON files in a collapsible tree.

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Text Diff Checker

Compare two code snippets side-by-side to highlight additions and removals.

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Regex Tester & Matcher

Test javascript regular expressions with highlighting and rule details.

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Base64 Encoder/Decoder

Translate strings and files to secure Base64 formats.

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Cryptographic Hash Generator

Encode text into MD5, SHA-1, SHA-256, or SHA-512 outputs.

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Markdown Live Editor

Edit Markdown syntax in real-time with an active HTML viewer.

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Word & Read-Time Counter

Analyze word count, lines, density, and estimated reading speeds.

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Text Case Converter

Switch between UPPERCASE, lowercase, camelCase, snake_case, title.

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Lorem Ipsum Generator

Generate placeholder paragraphs, words, or lists for designs.

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Base Number Converter

Convert numbers between Binary, Octal, Decimal, and Hex formats.

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Password & UUID Generator

POPULAR

Make randomized cryptographically-strong strings and UUID v4 keys.

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BMI & BMR Health Calculator

Calculate body mass index, base metabolic rate, and calorie goals.

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Universal Unit Converter

Quickly convert dimensions of length, weight, volume, or temperature.

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Frequently Asked Questions

Answers regarding security, compliance, and browser-side file parsing.

Are my files uploaded or stored on any server?

No. ToolNest Online utilizes standard client-side technologies (e.g., HTML5 FileReader, canvas buffers, WebAssembly, and local Javascript engines). All calculations, image rendering, and PDF stitching occur strictly in your browser's memory sandbox. Your files never cross the network.

Does ToolNest Online support mobile devices?

Yes, our layout is fully responsive and optimized for smartphones, tablets, laptops, and desktop browsers. You can resize images, convert text, and scan codes directly from your smartphone's camera.

Is it free to use for commercial purposes?

Absolutely. ToolNest Online is fully open and free for personal, educational, and commercial work. There are no volume limitations, subscriptions, or hidden charges.