Free · No account · Works offline
Point a camera. Get the answer.
52 tools across five families, all running in this tab.
Started as twelve kinds of QR code, checked against the standard each one is supposed to follow. It has grown into five families since — images, PDFs, a shareable note and developer tools too — built the same way: entirely in this browser tab.
No account. Nothing uploaded. Nothing that can be switched off.
↑ real code — try scanning it
Why the details matter
A malformed code still looks like a QR code. You only find out it is broken when someone is standing in front of it, trying.
A WiFi password containing ; or , corrupts the payload unless it is escaped. Most generators do not.
Wrong
WIFI:S:Rio;P:fl4t;22;;Right
WIFI:S:Rio;P:fl4t\;22;;Unescaped, the password reads as fl4t — and the code still scans.
Several UPI apps reject a payment code with no cu= field. Ours always sets it.
Wrong
upi://pay?pa=rio@ok&am=250Right
upi://pay?pa=rio@ok&am=250&cu=INRWithout cu=, several UPI apps refuse the payment outright.
Four more families
The same test applies to all five: open your network inspector, use the tool, and watch that nothing you gave it appears in a request. Here is what each family does instead of uploading.
A phone writes where you were standing into the file. Stripping it re-encodes nothing: the JPEG's APP1 and COM segments are dropped and the entropy-coded scan data is copied through, so the result is bit-identical and the colour profile survives.
Merging, splitting, extracting and reordering move the original page objects between documents with pdf-lib. Most free PDF sites rasterise each page on a server instead, which is why their output is larger, blurs when you zoom, and cannot be searched.
| Behaviour | Here | Rasterised |
|---|---|---|
| Text stays selectable | Yes | No |
| Fonts travel with pages | Yes | No |
| Sharp at any zoom | Yes | No |
| Screen readers see a document | Yes | No |
What you write is compressed into the URL fragment — the part after the #, which browsers never send to a server. That is not a policy we are keeping; it is how fragments work. Nothing is stored, so nothing can expire or leak.
What you type
# Milk
- Oat, not soyWhat you send
stayslocal.app/note#1AbC2dEf…These are the tools people paste secrets into — an access token to decode, a signing key to test. Every one of them computes in the page, using primitives the browser already ships.
The part nobody else does
A downloaded square is not a sign. Put it on an A4 or A5 page with your own heading and instructions, then print it or save a vector PDF — for any of the twelve types, not just the one someone built a template for.
Taped by the door. Nobody spells the password out loud again.
On the table, with the three steps people actually need.
By the till. Scanning opens a chat with the message already typed.
01
Any type. The studio opens on a layout written for that type.
02
Your heading, your instructions, your opening hours. Nothing is fixed.
03
Straight to a printer, or a vector PDF that stays sharp at any size.
Twelve kinds of QR code
Each type encodes a different standard, and getting that standard exactly right is what decides whether a code scans on a cheap phone in bad light. WhatsApp and UPI are the two that carry a whole conversation, or a whole payment, inside one square.
What this will always do
Every tool here is built entirely in this browser tab. A WiFi password, a UPI ID, a photo's GPS coordinates, a signed PDF, a pasted API key — none of it is sent anywhere, because there is no server to send it to.
Every tool, every export, at full quality. No watermark, no page cap, no trial that lapses — there is no paid tier to be moved onto.
Nothing is sent because there is nothing to send it to. Open the network tab and use any tool: your file never appears in a request.
Nothing to sign up for, so nothing to delete later. What history there is sits in this browser, on this device.
Installed to a home screen, the tools keep working with the network off. There is no call left to fail.
Your files never train anything. They were never in anyone's hands to train on — they are decoded, edited and re-encoded inside this tab.
No tool is held back to sell an upgrade. If a feature is on the page it is on the page, at full quality, for everyone.
A servernever reached
Where the limits are
What this will never do
ROADMAP.md keeps a list of things that would need a server, and therefore need trusting. It is published here so that it is a commitment rather than an internal note.
Later, maybe
Everything above is finished and free, and none of it is waiting on anything. These are the things being considered next — nothing is promised, and no date is being offered.
There is no paid tier today and nothing is being collected to sell. If anything is ever charged for it will be an added service, not the part you are already using.
No sign-up, no watermark, no trial. Pick a tool, do the thing, and take away the result — a QR code, a compressed photo, a merged PDF, whatever you came for.
We use privacy-friendly analytics to see which pages get used — never what is inside a code you generate, which stays on this device either way. Read the privacy policy.