Merge PDF files online — free, and without uploading them

Your files never leave your computer: everything runs in your browser.

Put your cover page, coursework and appendices into one document, or bundle every invoice for a claim. Reorder the files with the arrows and download the merged PDF instantly.

How to use it

Drag your PDFs onto the dashed area or click to choose them (you can add more in several batches).
Reorder them with ↑ and ↓; the list order is the final document's order.
Press Merge. MERGED.pdf downloads with every page.

📘 Full guide with examples

Frequently asked questions

Is there a file or size limit?

We set no limits. The only limit is your device's memory, since it does the work.

Does merging reduce quality?

No. Pages are copied as they are, without being recompressed.

Can I merge password-protected PDFs?

No. Remove the protection in your PDF reader first, or re-save it with “Print → Save as PDF”.

`º` / `Tab`	SHIFT / ALPHA (luego la tecla: `º7` = CONST)SHIFT / ALPHA (then the key: `º7` = CONST)
cos( sqrt( int(	Escribe el nombre de la función: sin/sen, cos, tan, asin, log, ln, exp, sqrt/raiz, cbrt, abs, int (integral), der (derivada), sum, prod, pol, rec, mcd, mcm, det...Type the function name: sin, cos, tan, asin, log, ln, exp, sqrt, cbrt, abs, int (integral), der (derivative), sum, prod, pol, rec, gcd, lcm, det...
pi e ans x A	π, número e, Ans, variable x; mayúsculas A–F y M son las memoriasπ, number e, Ans, variable x; capitals A–F and M are the memories
`,` `)`	En 2D la coma pasa al siguiente hueco y ")" sale de la plantilla: int(x^2,0,1)In 2D the comma jumps to the next box and ")" leaves the template: int(x^2,0,1)
`-` `~`	El menos es signo negativo al principio o tras un operador (5--3, 2-4); `~` lo fuerzaMinus is a negative sign at the start or after an operator (5--3, 2-4); `~` forces it
`=` `Enter`	`=` escribe el igual (CALC, SOLVE, Verificar); `Enter` calcula; `Shift`+`Enter` en decimal`=` types the equals sign (CALC, SOLVE, Verify); `Enter` calculates; `Shift`+`Enter` as a decimal
`^` `!` `%` `\|`	Potencia, factorial, porcentaje, valor absolutoPower, factorial, percent, absolute value
`Inicio` `Fin`	MENU y OPTN · `Supr`/`Esc` = AC · `⌫` = DELMENU and OPTN · `Del`/`Esc` = AC · `⌫` = DEL

Merge PDF files online — free, and without uploading them

Unir PDFs

How to use it

Frequently asked questions

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