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30+ powerful PDF tools in one place. No downloads, no watermarks, no limits on the essentials โ€” just fast, secure results right in your browser.

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Why 400Tools?

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Blazing fast

Most tools finish in seconds. Files are processed instantly in your browser with zero upload wait for supported operations.

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Private & secure

Where possible, processing happens entirely on your device โ€” your files never leave your computer. When uploads are needed, they're encrypted and deleted after processing.

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100% free

All essential tools are free to use with no hidden fees, no watermarks on your output, and no forced sign-up to get started.

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No downloads

Works directly in your browser on any device. No software to install, no updates to manage โ€” just open a tool and go.

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32+ tools in one place

Merge, split, compress, convert, edit, sign, protect, and more. Stop jumping between websites โ€” every PDF task lives here.

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Works everywhere

Fully responsive on desktop, tablet, and mobile. Pick up where you left off on any device, anywhere.

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No watermarks

Your output files are clean. We never stamp, brand, or degrade your documents โ€” what you upload is what you get back.

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AI-powered tools

Summarize, translate, and compare PDFs with built-in AI. Turn documents into Markdown ready for LLMs and AI pipelines.

One platform, every PDF task

From everyday edits to advanced AI workflows โ€” organized into six categories so you always find the right tool fast.

How it works

Three simple steps. No account required for everyday tasks.

1

Upload your file

Drag & drop or click to select. Most tools accept multiple files at once.

2

Choose your options

Fine-tune settings like quality, page range, format, or security โ€” or just hit process with the smart defaults.

3

Download instantly

Get your finished file in seconds. No watermarks, no sign-up walls, no waiting.

Unlock more with Premium

  • โœ“ Process larger files and longer documents with no size limits
  • โœ“ Advanced OCR, batch processing, and desktop access for offline work
  • โœ“ Create custom workflows that chain your favorite tools together
  • โœ“ Priority processing and premium support
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No limits. No waiting.
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Fast, private tools you can use from any device

Your documents are yours alone. We build every tool with privacy, security, and reliability at the core โ€” so you can work with confidence.

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