AboutHelp
Justools

Free, private browser tools for everyday tasks.

PDF tools

  • Merge PDF
  • Split PDF
  • Organize PDF
  • Rotate PDF
  • Delete PDF Pages
  • Add Page Numbers
  • Watermark PDF
  • Image to PDF
  • PDF to JPG
  • PDF to PNG
  • Remove PDF Password
  • Compress PDF
  • Protect PDF
  • PDF to Text
  • Crop PDF
  • Flatten PDF

Image tools

  • Image Converter
  • JPG to PNG
  • PNG to JPG
  • JPG to WebP
  • WebP to JPG
  • WebP to PNG
  • Image to WebP
  • Image Cropper
  • Lasso Crop
  • Remove Photo Metadata
  • SVG Optimizer
  • Resize Image
  • Compress Image
  • Remove Background
  • Image to Text

Developer tools

  • JSON Formatter
  • CSV to JSON
  • Hash Generator
  • Base64
  • URL Encode
  • Timestamp Converter
  • Diff Text
  • Case Converter
  • Word Counter
  • Color Contrast
  • Unit Converter

Utility tools

  • QR Code Generator
  • Trim Video
  • Merge Video
  • Screen Recorder
  • Voice Recorder

Creative tools

  • Coloring Pages
  • Graph Paper Generator
  • Spin the Wheel

Calculators

  • Cost of Raising a Child Calculator
  • Calorie Deficit Calculator
  • BMI Calculator
  • Age Calculator
  • Date Calculator
  • City Time Converter
  • Scientific Calculator
  • Fraction Calculator
  • Cost of Living (20 countries)
  • Budget Planner
  • Pay Raise Calculator

Company & legal

  • All personal tools
  • Insights
  • Business
  • Learn
  • About
  • Help
  • Support
  • Contact
  • Privacy
  • Terms of Use
  • Disclaimer

© 2026 Justools. General information only, not financial advice.

Merge Videos

Combine short matching clips into one file. Same size and format required.

Creator and design gear

Photo & Graphic Design Essentials

Creator Deals

Upgrading your creative workflow? Shop top-rated drawing tablets, color-accurate monitors, and photo editing accessories on Amazon.

Explore Creator & Design Gear →*As an Amazon Associate, Justools earns from qualifying purchases.

Other useful tools

Free tools that often go together. Everything runs in your browser.

  • Utility toolsTrim VideoCut the start or end of a short video
  • Utility toolsScreen RecorderRecord your screen locally
  • Utility toolsVoice RecorderRecord audio in your browser
  • Utility toolsQR Code GeneratorCreate and scan QR codes
  • PDF toolsMerge PDFCombine PDFs in your browser
  • PDF toolsSplit PDFExtract pages or split to ZIP

How to use this tool

  1. Add 2 to 5 MP4, MOV, or WebM files that share the same size, codec, and frame rate.
  2. Reorder with ↑ ↓ or drag so the list matches the order you want in the output.
  3. If a clip does not match, remove it or convert it first. Mixed portrait and landscape will not join.
  4. Tap Download merged MP4 or Download merged WebM. Packets are copied in your browser. Nothing is uploaded.
  5. Preview the combined clip on the page. Download it again, or use Share on iPad when your browser offers it.

Frequently asked questions

What does merge video do?▾

Merge video joins two to five short clips into one file, in the order you set. It is the same idea as merging PDFs: matching pages (here, matching video settings) become one document. People use it to glue two halves of a talk, stack short iPad camera takes, or join screen-recorder WebMs. The output keeps the original codec. There is no crossfade and no music bed. If the clips were shot the same way, on the same device, they usually match.

Why merge here instead of a timeline editor?▾

A timeline is the right tool when clips need titles, volume, or different sizes. When you only need clip A then clip B, copying packets is faster and keeps quality. That is useful on iPad, where a full re-encode of 1080p can freeze Safari. You stay in the browser, with no account. Teachers can join two lesson takes before sending a file. Families can join two birthday clips from the same iPad camera. If one clip is 30 fps and the next is 60 fps, this page will refuse rather than stretch the picture.

What does matching mean?▾

Clips must share container family (MP4/MOV or WebM), video codec, audio codec (or all silent), display width and height, and frame rate. A 1080x1920 portrait clip will not join a 1920x1080 landscape clip. A HEVC phone clip will not join an H.264 screen recording. Trim first if you only need part of a take, then merge the matching results.

Does merge work on iPad?▾

Two or three short matching clips can work, including 4K HEVC from Photos if every clip is the same size. Five large files are more likely to reload the tab. The combined size must stay under 250 MB on iPad and under 10 minutes total. Trim is the more reliable iPad job when files are large.

How do I change the order?▾

Use the up and down buttons, or drag a row. The first clip in the list is the start of the output. Remove a clip if it was added by mistake. Adding a sixth file is ignored.

Is my video uploaded?▾

No. Join runs in your browser. We do not store the clips. Video is not restored after a refresh, which avoids Safari crashes on iPad.

What are the limits?▾

Two to five files, 10 minutes per file, 10 minutes combined. Desktop cap 500 MB total. iPad cap 250 MB total. Resolution at most 3840 on the long edge and 2160 on the short edge, including 4K portrait 2160x3840.

Should I trim or merge first?▾

Trim each take so the join is only the useful parts, then merge. Merging first and trimming later still works if the joined file stays under the size cap. Use Trim video for one file and this page when you have two or more matching files.

Processed locally in your browser. Your files are never uploaded to our servers.