Free · No account · Nothing uploaded
Tiny tools that never upload your files.
Four of them so far. One moves files between your own devices, one fixes up and signs PDFs, one trims and layers video, and one makes QR codes. They all run inside your browser, so the files you open never leave your computer or phone. There is nothing to install and nothing to sign up for.
The tools
OtterDrop
Send files to the other devices on your Wi-Fi.
Open it on your phone and on your laptop. They find each other, and the file goes straight across.
- Phone to laptop
- No size limit
- Nothing uploaded
OtterPDF
Merge, split, rotate, fill in and sign PDFs.
You get a thumbnail of every page. Put them in order, turn the sideways ones, then save.
- Merge
- Split
- Rotate
- Fill & sign
OtterStudio
Trim, layer and title video, then export an MP4.
Cut what you don't want, put a second video in the corner, add captions, clean up the sound.
- Trim
- Picture-in-picture
- Titles
- Reels & Shorts
OtterQR
Make a QR code, style it, drop your logo in.
For a link, your Wi-Fi or a contact card. Pick a shape and colours, then save a PNG or a vector SVG.
- Link
- Wi-Fi
- Logo in the middle
- PNG & SVG
- Suggest a tool
More on the way
We add a tool when we need one ourselves. If something you do online shouldn’t need a sign up, tell us about it.
How it works
Why nothing gets uploaded
The page is the program
Your browser downloads a bit of code and runs it. That code opens your file, does the work and saves the result, all on your own machine.
Nothing to log in to
Accounts exist so a company can hold your data for you. Nothing here leaves your device, so there is no login, no history and no files of yours to delete.
Ordinary web technology
No plugins and no extensions. Each tool is built on something your browser already ships with.
- OtterDrop
- WebRTC, the same thing video calls use, so two devices talk straight to each other.
- OtterPDF
- pdf.js to draw the pages, pdf-lib to write the new file, both in a worker on the page.
- OtterStudio
- A canvas for every frame, then WebCodecs, the video encoder built into the browser.
- OtterQR
- An SVG your browser paints, and a canvas when you want that SVG as a PNG.
Guides
All guides →- Merge PDF files without uploading themCombine a few PDFs into one, in the order you want.
- Split a PDF or extract specific pagesGet pages 3 to 7 out of a long report as their own file.
- Rotate PDF pages the right way upFix a sideways scan so it stays fixed in every viewer.
- Share files between your phone and computerPhotos and documents across devices on the same Wi-Fi, no cable.
- Trim a video without uploading itCut the start and end off, or take a piece out of the middle, and save an MP4.
- Put a reaction cam in the corner of a videoTwo videos playing together, one small over the other, exported as one file.
- Add titles and captions to a videoWords on the picture, timed on the timeline, with a look, a box and a fade.
- Turn a landscape video into a Reel, TikTok or ShortOne button makes the frame 1080×1920, and the footage keeps filling it.
- Make a QR code for a linkA code that points straight at your page, with no redirect in the middle.
- Put your logo in the middle of a QR codeHow big it can safely be, and why the code still scans with a piece missing.
Questions
- Is it free?
- Yes. There is no account, no trial and no paid version. Hosting costs very little because your device does the actual work. Some pages may show a small ad to cover the rest. An ad can’t see the files you open here.
- Can you see my files?
- No. Each tool is a web page whose code runs in your browser. It reads the file on your device and writes the result back to your device. There is no server on our side that receives files. You can check this yourself in your browser’s network panel while you use a tool. The one exception is described in the privacy policy: OtterDrop exchanges a few bytes of connection data so two devices can find each other. Never the files.
- Do the tools work offline?
- OtterPDF, OtterStudio and OtterQR do. After the first visit they keep working with no connection. OtterDrop needs the devices to reach each other, so it needs a network, but not the internet. A home router or a phone hotspot is enough.
- Which browsers?
- Current Chrome, Edge, Firefox and Safari, on desktop and mobile. It’s all standard web APIs (WebRTC for OtterDrop, Web Workers for OtterPDF, WebCodecs for OtterStudio, plain SVG and canvas for OtterQR). The one gap: Firefox has no video encoder yet, so OtterStudio can edit there but exports only in Chrome, Edge and Safari. Nothing to install.
- Is there a file-size limit?
- Only your device’s memory. Nothing is uploaded, so there is no server-side cap. OtterPDF warns at 100 MB per file because phones can run out of memory rendering very large scans. OtterDrop sends files in small chunks, so multi-gigabyte transfers work fine. OtterStudio plays whatever your browser can decode, 4K included; a long export just takes a while.
- Who makes this?
- Two indie developers, in our spare time. There’s a bit more on the about page. If something is broken or you have an idea, write to us.
Why we made this
We got tired of websites that want you to upload a PDF just to merge it, or to make an account to move a photo from a phone to a laptop. A browser can do these things on its own. So the two of us are building a few small tools that do, and we add one when we need it.
