Free Online PDF Tools – Compress, Merge & Flatten PDFs
Working with PDF files shouldn't require expensive desktop software or sketchy upload services. Tools Oasis gives you a complete set of free PDF tools that run entirely inside your browser — your documents never leave your device, so confidential contracts, tax forms, and personal records stay private.
Need to shrink an oversized PDF before emailing it? Our PDF Compressor reduces file size by intelligently re-encoding images and stripping unnecessary metadata, often cutting 50-80% without visible quality loss. Dealing with multiple invoices, reports, or scanned pages? The PDF Merge tool lets you drag, drop, and reorder files into a single combined document in seconds.
If you've ever submitted a PDF form only to have the recipient see blank fields, you know the frustration of un-flattened forms. The PDF Flattener permanently bakes form data, annotations, and interactive elements into the page — ensuring every viewer sees exactly what you intended, on any device or reader.
Every tool processes files locally using modern JavaScript APIs. There are no server uploads, no file-size limits imposed by a backend, and no waiting in a queue. The result? Faster conversions, zero privacy risk, and tools that work offline once the page has loaded. Bookmark this page and come back whenever you need to handle a PDF task quickly and securely.
PDF Compressor
Reduce PDF file size by up to 80% without losing visible quality. Perfect for email attachments, uploads, and archiving large documents.
Free ToolPDF Flattener
Flatten form fields, annotations, and interactive elements into the PDF page so your document looks identical everywhere.
Free ToolPDF Merge
Combine multiple PDF files into a single document. Drag and drop to reorder pages before merging — no file-size limits.