Frequently Asked Questions

OpenToolsKit is a free, privacy-focused browser toolkit for PDF and document workflows. Core tools run locally where applicable, so routine editing, conversion, merging, splitting, and security tasks do not require uploading files to an OpenToolsKit processing server.

Yes, OpenToolsKit is completely free to use. There are no hidden costs, no premium tiers, and no registration required. All features are available to everyone.

No, you don't need to create an account or register to use OpenToolsKit. Simply visit the website and start using any tool immediately.

No, your files are never uploaded to any server. All PDF processing happens locally in your browser using JavaScript and WebAssembly. Your files never leave your device.

Yes, OpenToolsKit is designed with privacy in mind. Since all processing happens locally in your browser, your sensitive documents remain on your device and are never transmitted over the internet.

Your files are stored temporarily in your browser's memory during processing. Once you close the browser tab or navigate away, all file data is automatically cleared. We don't store any of your files.

OpenToolsKit includes tools for merge, split, compress, convert, edit, annotate, sign, add watermarks, encrypt, decrypt, OCR, and related browser-side document workflows.

Yes, you can merge multiple PDF files into one. Simply use the Merge PDF tool, upload your files, arrange them in the desired order, and click merge.

Yes, OpenToolsKit supports converting various image formats (JPG, PNG, WebP, BMP, TIFF, SVG, HEIC) to PDF. You can convert single or multiple images at once.

OpenToolsKit provides annotation and editing tools including highlighting, adding text, shapes, images, and signatures. For full text editing, the PDF Editor tool offers comprehensive annotation capabilities.

OpenToolsKit works on all modern browsers including Chrome, Firefox, Safari, and Edge. We recommend using the latest version of your browser for the best experience.

Most tools support files up to 100MB, with some tools like merge and compress supporting up to 500MB. These limits are in place to ensure smooth performance in your browser.

Since all processing happens in your browser, performance depends on your device's capabilities. Large files require more memory and processing power. For best results, close other browser tabs and applications.

Currently, OpenToolsKit requires an internet connection to load the application. However, once loaded, the PDF processing itself happens locally and doesn't require a connection.

OpenToolsKit is available in 13 locales: English, Japanese, Korean, Spanish, French, German, Simplified Chinese, Traditional Chinese, Portuguese, Arabic, Italian, Indonesian, and Vietnamese.

You can change the language using the language selector in the header. Your preference will be saved for future visits.