Drop files here
About Merge PDF — Free Online Tool
Merge PDF joins several PDFs end to end, in the order you arrange them, and returns one file. It takes up to 25 documents at 100 MB each, which covers the ordinary jobs: a year of statements into one attachment, a contract that arrived in three parts, or a scan whose front and back came out as separate files.
Each input's page tree is appended into a single document catalogue and the cross-reference table is rebuilt around the result. Page content streams are copied across rather than re-encoded, so text stays selectable, vector artwork stays sharp, and the merged file is exactly as crisp as the originals — merging is not a quality decision.
The merge happens in the page you are reading. Nothing is uploaded, so a signed contract or a bank statement never leaves the machine it is on, and there is no copy on a server to delete afterwards.
Putting bank statements together for a visa or loan application, combining an ID scan with its reverse side into one attachment, reassembling a report whose chapters were written separately, and collecting a month of invoices into a single file for an accountant.
Also known as: combine pdf · join pdfs · merge documents · concatenate pdf · pdf joiner · put pdf together
When to use it
Consolidates invoices, monthly reports, bank statements, and legal contracts into an organized document.
How it works
Reads binary xref tables and appends page dictionary references without recompressing page content.
Fast Client-Side Assembly
Runs directly in your browser without uploading private legal documents to third parties.
How to Use Merge PDF in 4 Easy Steps
Follow this simple guide to process your files in seconds directly inside your browser tab.
Select or Drop Your PDF
Drag and drop your PDF directly into the Merge PDF workspace above or click 'Choose files'. You can process up to 25 files in a single run.
Configure Your Preferences
Adjust the available optimization sliders, target formats, or custom options. Consolidates invoices, monthly reports, bank statements, and legal contracts into an organized document.
Instant In-Browser Execution
The client-side engine executes Merge PDF locally on your device hardware with zero server latency and 100% private in-memory sandboxing.
Preview & Download PDF
Inspect the processed file, compare file size savings or output quality, and click Download to save the finished PDF file directly to your disk.
Why Use Merge PDF on ShortTrick
Engineered for maximum speed, strict privacy, and frictionless digital productivity.
100% Private & Local
Files processed with Merge PDF never leave your computer or phone. Zero cloud uploads, zero tracking, and zero risk.
Blazing Fast Engine
Powered by compiled WebAssembly code running directly in your browser with sub-second execution for Merge PDF.
No Paywall or Account Required
Merge PDF is completely free with no hidden charges, watermarks, email signups, or artificial daily limits.
High-Fidelity Quality
Advanced algorithms preserve crisp vector text, clear colors, and structural layout integrity.
Generous 100 MB Size Limit
Handle files up to 100 MB and process up to 25 files in convenient batches with Merge PDF.
Cross-Device Compatibility
Runs seamlessly in modern browsers on Windows, macOS, Linux, iOS (iPhone/iPad), and Android.
Supported Formats & Limits
Designed for high performance with browser-side memory guarantees.
100 MB
25
Frequently Asked Questions About Merge PDF
Common questions regarding Merge PDF, data privacy, file format compatibility, and usage limits.
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