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Hardware tests39

Input devicesKeyboard test Mouse test Gamepad test Stylus and pen test PS5, PS4 and Switch controller test Double click test Scroll wheel test

DisplayMonitor test Refresh rate test Stuck pixel fixer Color blindness test Screen size and PPI calculator Monitor calibration test

Audio and cameraSpeaker test Microphone test Webcam test Hearing test 3D audio test Audio latency test Decibel meter Focus sounds

MobileTouch screen test Sensor test Vibration test GPS test NFC test

NetworkMy IP address Ping and jitter test DNS speed test WebRTC leak test IPv6 test

Speed and reflexesCPS test Reaction time test Typing speed test

SystemSystem info CPU and GPU benchmark Storage speed test USB device info

MusicMIDI keyboard test

PDF tools41

Organize PDFMerge PDF Split PDF Remove pages Extract pages Organize PDF Scan to PDF Add pages to PDF Multiple pages per sheet

Optimize PDFCompress PDF Repair PDF OCR PDF PDF to PDF/A

Convert to PDFJPG to PDF Office to PDF

Convert from PDFPDF to JPG PDF to Word PDF to PowerPoint PDF to Markdown PDF to Excel Extract images from PDF PDF to text PDF to CSV PDF to HTML

Edit PDFRotate PDF Add page numbers Add watermark Crop PDF Fill PDF forms Edit PDF Edit PDF metadata Change PDF page size PDF bookmarks Bates numbering Add QR code to PDF Create fillable PDF Attach files to PDF

PDF securityUnlock PDF Protect PDF Sign PDF Redact PDF Compare PDF

AI PDF toolsSummarize PDF (AI)Coming soonTranslate PDF (AI)Coming soonChat with PDF (AI)Coming soon

Media tools25

ImagesHEIC to JPG Compress image Resize image Image converter EXIF viewer and remover Remove background QR code generator QR code scanner Crop and rotate image Watermark images Image to text (OCR)

Audio and videoVideo to MP3 Compress video Trim video Screen recorder Webcam recorder Voice recorder Video to GIF Video converter Rotate and crop video Merge videos Audio cutter Audio converter Normalize audio

FilesFile hash checker

Merge PDF

Runs locally

Add your PDF files, put them in order and merge them into a single document.

Drop PDF files hereChoose files Processed in your browser. Your files are not uploaded.

How to use

Choose or drop two or more PDF files.
Use the arrows to put them in the order you want.
Press Merge PDF and download the result.

Frequently asked questions

Are my files uploaded?

No. Merging happens in your browser and the files never leave your device.

Is there a limit?

Each file can be up to 200 MB. Very large merges depend on the memory of your device.