PDF Management

PDF Editor

Edit text, draw, and annotate your PDF files directly.

Merge PDFs

Combine multiple PDFs into one neatly organized file.

Split PDF

Extract pages or split a PDF into individual documents.

Crop PDF

Trim margins or split pages with a visual editor.

Compress PDF

Optimize file size without losing document quality.

Protect PDF

Add password encryption to your sensitive documents.

Unlock PDF

Remove passwords and security from PDF files.

OCR PDF

Transform scanned images into searchable PDF text.

Watermark PDF

Stamp text or image watermarks on your documents.

Merge PDF & Images

Combine PDFs, JPGs, and PNGs into a single document.

Smart Converters

Word to PDF

Convert DOCX files to high-quality PDF documents.

Image Converter

Convert between PNG, JPG, and WEBP formats.

PDF to Word

Extract content from PDF back into Word documents.

PDF to JPG

Extract pages as high-resolution image files.

SEO Tools

Advanced SEO Engine

Audit your website's performance and SEO health.

Rank Checker

Check your keyword position in Google Search rankings.

Density Checker

Analyze keyword frequency and phrasing on any page.

Text Compare

Compare two texts side-by-side to find differences.

The Complete Guide to Secure, Client-Side Document Management

Welcome to the definitive platform for online document processing. ToolMini isn't just a collection of tools—it's a privacy-first ecosystem designed to handle every aspect of your PDF and image workflow directly in your browser.

Why the World is Switching to Client-Side PDF Tools

In the traditional landscape of online file conversion, users were forced to choose between convenience and security. Most "free online converters" operate on a server-upload model: you upload your private contract, thesis, or financial statement to a remote server, their software processes it, and you download the result. This model is fraught with risks. Who owns that server? Is your file actually deleted? Is the transmission encryption robust? ToolMini eliminates these questions by removing the server from the equation entirely.

Leveraging cutting-edge WebAssembly (WASM) technology, we bring the power of desktop software into your Chrome, Firefox, or Edge browser. When you use our PDF Editor or Compressor, the code runs locally on your device's CPU. This means your data never leaves your computer. It is physically impossible for us to see, store, or leak your files because we simply never receive them. This architectural breakthrough allows us to offer unlimited file processing without the bandwidth costs that force other sites to charge premium subscriptions. It is the perfect marriage of privacy, speed, and accessibility.

Explore Our Comprehensive Tool Ecosystem

ToolMini provides a specialized utility for every stage of the document lifecycle. Below is a detailed breakdown of our capabilities, designed to help you find exactly the right solution for your workflow.

PDF Editor Online

Our flagship Free PDF Editor is a powerful alternative to heavy desktop applications like Adobe Acrobat. Unlike basic annotators, our editor allows for complex interactions. You can add text to PDF forms, ideal for filling out non-interactive applications or invoices. The freehand drawing tool is perfect for digital signatures, allowing you to sign documents using your mouse or touchscreen. We also support adding shapes (rectangles, circles) to highlight critical sections or redact sensitive information visually before saving. Because it renders fonts natively in the browser, your edits remain sharp and professional.

Merge PDF Files

The PDF Merger tool is essential for organization. Whether you are archiving monthly bank statements or compiling a project portfolio, merging disparate files into a single document is a daily necessity. Our tool allows you to combine PDF files with drag-and-drop simplicity. You can reorder files visually before merging to ensure the final document flows correctly. This tool handles large batches efficiently, processing dozens of files in seconds without the strict file size limits imposed by server-based tools.

Split PDF Documents

Conversely, our PDF Splitter gives you granular control over large documents. If you have a 100-page scanned book but only need chapter 3, you can easily extract PDF pages into a new file. Our interface supports multiple split modes: extract all pages as individual files, select specific page ranges (e.g., 5-10), or simply remove unwanted pages to clean up a draft. This is particularly useful for legal professionals who need to isolate specific exhibits from a larger case file.

Compress PDF Size

Email attachments often have strict size limits (usually 25MB). Our PDF Compressor uses advanced algorithms to reduce PDF file size without destroying legibility. It intelligently analyzes document assets, downsampling high-resolution images that don't need to be print-quality and stripping unnecessary metadata. You can often see reductions of up to 80%, making it easy to share portfolios, reports, and manuscripts via email or messaging apps like Slack and WhatsApp.

Crop PDF Pages

Scanned documents often come with messy black borders or punch-hole marks. Our Crop PDF tool provides a visual canvas where you can adjust the visible area of your document pages. This is indispensable for trimming PDF margins to make text more readable on e-readers or tablets. It's also useful for splitting double-page scans (two book pages on one PDF sheet) by cropping the same file twice to create separate pages.

PDF Security Suite

Security is paramount. Our Protect PDF tool allows you to encrypt PDF files with strong passwords using industry-standard AES encryption. This ensures only authorized recipients can view your content. Conversely, if you have old secured files and have the password, our Unlock PDF tool (Password Remover) can strip the security layer, allowing you to edit, print, or copy text from the document freely again.

Word to PDF Converter

The DOCX to PDF converter is one of our most popular utilities. It preserves the complex formatting of your Microsoft Word documents—tables, headers, custom fonts, and alignment remain intact during conversion. This is crucial for students submitting academic papers and professionals sending resumes (CVs), as sending a PDF ensures the recipient sees exactly what you authored, regardless of their device or software version.

Advanced Image Converters

We believe in versatile media management. Our suite includes tools to convert JPG to PDF, perfect for turning a series of photos (like receipts or whiteboard notes) into a single document. We also support PDF to JPG extraction, turning document pages into high-resolution images. Furthermore, our general Image Converter supports modern web formats, allowing you to switch between PNG, JPG, WEBP, and GIF effortlessly.

Industry-Specific Solutions: Who uses ToolMini?

🎓 Education & Academia

Students and researchers use ToolMini to compile thesis chapters using the Merge tool, compress assignments for submission portals like Blackboard or Canvas, and convert citations and references from Word to stable PDF formats.

⚖️ Legal & Corporate

Lawyers and paralegals rely on our client-side security to handle sensitive contracts. Features like Bates Numbering (via editing), margin cropping for court filings, and secure encryption are vital for maintaining client confidentiality.

🎨 Design & Creative

Graphic designers use our converters to flatten design proofs into secure PDFs for client review. The Image to PDF tool is frequently used to create mood boards and visual portfolios that are easy to share and view on any device.

Technical Guide: Understanding Client-Side Processing

For the technically inclined, it is important to understand how ToolMini achieves its privacy guarantees. Traditional servers use older languages like PHP or Python to process files on the backend. We utilize JavaScript libraries such as pdf-lib and jsPDF, along with Web Assembly modules compiled from C++ code (like using Ghostscript or Poppler in a WASM container).

When you start a task, your browser downloads a small "engine" script. This engine creates a virtual file system in your RAM. The input file is read into this memory space, processed mathematically, and the output is generated as a Blob object url. This entire lifecycle happens inside the "sandbox" of your browser tab. No network request carrying your file payload is ever initiated. This is the future of GDPR-compliant document processing.

Beyond Documents: Advanced SEO Utilities

ToolMini has evolved to support webmasters and digital marketers with a suite of Free SEO Tools. We understand that document management often overlaps with web publishing.

Rank Checker: A utility to verify search engine positions (SERP) for specific keywords, helping you track your marketing ROI.
Keyword Density Checker: An essential tool for copywriters to analyze text (like this guide!) to ensure optimal keyword usage without "stuffing," enhancing readability and search relevance.
Text Compare: A diff-checker tool invaluable for developers and editors to spot minute differences between two versions of code or text.

Join millions of users who trust ToolMini for their daily document needs. Whether you need to edit a PDF, compress a file, or analyze SEO data, we provide the fastest, safest, and most reliable tools on the web.

Zero-Knowledge Privacy

Your files never leave your device. We use browser-based processing to ensure 100% data sovereignty.

WASM Accelerated

Unlimited & Free

No hidden paywalls, no "3 files per day" limits. Professional tools accessible to everyone.

Frequently Asked Questions (FAQ)

Everything you need to know about using ToolMini's suite of PDF, Image, and SEO tools.

ToolMini occupies a unique space in the web utility market: we are 100% free with no tier restrictions for standard daily use. Unlike competitors who might limit you to "2 tasks per hour" or "files under 5MB," our client-side architecture incurs very little cost for us per conversion. This efficiency allows us to offer unlimited usage to our community without charging subscription fees.

It is the most secure method available online. When you upload a file to a standard converter, you are trusting their server security, their employees, and their data deletion policies. With ToolMini, the file is read by the browser into your computer's RAM. The processing script runs locally. The "upload" never travels over the internet. For legal, medical (HIPAA), or financial documents, this guarantees that no third party ever has possession of your data.

No. ToolMini works entirely in your web browser (Chrome, Safari, Edge, Firefox, Brave, etc.). You do not need to download .exe files, install Flash, or add browser extensions. It is a zero-footprint solution that leaves no trace on your operating system.

Our PDF Merge tool handles mixed page sizes (e.g., Letter, A4, and Legal) seamlessly. It preserves the original dimensions of each page within the merged document. You don't need to resize them beforehand. Just drag and drop your mixed files, arrange the order, and merge.

Scanned PDFs are essentially images. To edit the text, the computer first needs to "read" it. This requires our OCR (Optical Character Recognition) tool. You should first run the scanned file through our OCR tool to convert the image-text into selectable text, and then use the PDF Editor to make changes.

Compression works by removing redundant data. In PDFs, high-resolution images take up the most space. Our compressor downsamples these images (e.g., from 300 DPI print quality to 72 DPI screen quality). While this drastically reduces file size, it may make images look slightly softer if you zoom in very close. We aim for a balance optimized for screen viewing and email sharing.

Yes. Our DOCX to PDF converter includes a sophisticated parsing engine that understands complex Word layouts. It preserves tables, inline images, headers, footers, and page numbers. However, highly proprietary features (like active macros or specific Word Art) might be simplified during conversion.

Your original file remains untouched on your computer. The conversion process creates a new file (the output). You simply download this new file. The browser then clears its memory cache when you close the tab, ensuring no trace of the processed data remains.

Since processing happens on your device, speed depends on your CPU and RAM. Large files (e.g., 200MB+) or complex operations (like OCR on 50 pages) require significant processing power. Closing other browser tabs or applications can free up resources for ToolMini to run faster.

Yes, ToolMini is fully responsive. However, note that iOS (iPhone/iPad) file systems work differently than desktops. You may need to save your files to "Files" or "iCloud Drive" so that the browser can access them for upload. The conversion logic works exactly the same.

Most of our tools, like PDF Merge, PDF to JPG, and Image Converter, support batch processing. You can select multiple files in the file picker or drag and drop a group of files. They will be processed in queue or combined depending on the tool selected.

Interesting fact: Once the tool page is fully loaded, you can actually go offline! Because the code is already downloaded to your browser, you can often convert files without an active connection (though we recommend staying online for any background asset loading). This is great for working on airplanes or in spots with spotty Wi-Fi.

Professional PDF & Image Tools Made Simple.