Your Free Online File Toolbox
Convert, compress, edit, organize and analyze files without installing software. Fast, private tools that run right in your browser.
15 Tools
Merge, Split, Compress
Image
12 Tools
Compressor, Resizer, Converter
Text
8 Tools
Word Counter, Case Converter
Dev
12 Tools
JSON Formatter, Base64 Encoder, UUID Generator
Drop a file into any tool — processing happens locally, nothing leaves your device.
Popular tools
The tools people use most on FilesFortress.
Merge PDF
Combine multiple PDF files into a single document.
Split PDF
Split a PDF into multiple separate files or pages.
Compress PDF
Reduce PDF file size while preserving quality.
JPG to PDF
Convert JPG images to PDF files in your browser.
PDF to JPG
Convert PDF pages to JPG images.
Image Compressor
Reduce image file size without losing quality.
Image Resizer
Resize images to exact pixel dimensions.
Image Converter
Convert images between JPG, PNG and WebP.
PNG to WebP
Convert PNG images to the WebP format.
WebP to JPG
Convert WebP images to the JPG format.
Browse by category
Every tool organized into a focused workspace.
PDF Tools
Merge, split, compress, convert and secure PDF files.
15 tools
Image Tools
Compress, resize, crop and convert images instantly.
12 tools
Document Tools
Work with documents, formats and page content.
4 tools
Text Tools
Count, clean, sort and transform plain text.
8 tools
Developer Tools
JSON, XML, Base64, hashing and encoding utilities.
12 tools
File Utilities
File size conversion, MIME lookup and more.
4 tools
Converters
Convert files between popular formats.
12 tools
Calculators
File-related calculators and conversions.
3 tools
Why FilesFortress
Browser-first
Most tools process files directly in your browser — no server round trip.
Privacy-first
Files that are processed locally never leave your device.
Fast
No queues, no uploads to wait on. Results appear in seconds.
Free
Every tool is free to use, with no account required.
Cross-device
Works on desktop, tablet and mobile browsers.
Simple workflow
Pick a tool, add a file, get your result. That's it.
How it works
Choose a tool
Pick from over 50 file tools organized by category.
Add your file
Drag and drop or select a file from your device.
Process it
Your file is processed instantly, most often right in your browser.
Download your result
Save the output file — no watermarks, no waiting.
Your files stay on your device.
Wherever technically possible, FilesFortress processes your files entirely inside your browser using JavaScript — the file is never uploaded to a server. Tools that require server-side processing are clearly marked, so you always know how your file is being handled.
Under the hood, local tools use browser-native APIs — the Canvas API for image processing, the Web Crypto API for hashing, and JavaScript libraries that run entirely client-side for PDF manipulation. Your file is read into memory by your browser, transformed, and handed back to you as a download — it never touches a network request.
Popular conversions
Frequently asked questions
Explore All File Tools
Over 50 free tools for PDF, image, text and developer file tasks — all in one place.
Browse All Tools