Why Browser-Based PDF Tools Are Safer
Most online PDF sites upload your documents to their servers for processing. That means your contracts, bank statements, ID scans and medical records sit on someone else's computer — even briefly — where they can be logged, stored or leaked. ToolsFlash PDF tools use the open-source pdf-lib engine running inside your browser: files are read from your device's memory, processed locally, and the result is saved straight back to your device. Nothing is transmitted, so there is nothing to leak.
Available tools
- Merge PDF — combine two or more PDFs into a single document, with drag-and-drop ordering.
- Images to PDF — turn JPG and PNG photos into a clean PDF, with A4/Letter page sizes or exact fit.
Working with photos first? Our Image Compressor can shrink images before converting them to PDF — smaller inputs make smaller PDFs.