Project · Tools for files
Feinwerk
Six file tools that never touch your files. Everything runs in the browser — no upload, no account, no server.
feinwerk-tools.de ↗Next.js · WebAssembly · pdf.js
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The fear of uploading
Other tools upload your files to someone else’s servers.
someone else’s server
Your device
foto.heicvertrag.pdfscan.jpgrechnung.pdfausweis.pngStays local
How Feinwerk works
The file stays on one track — yours.
Your device Local
foto.heic
selectconvertsave
Never sent
0Bytes sent to the internet
Six tools
01 / 0601Tool
HEIC → JPG
iPhone photos in a format that opens everywhere.
HEIC→JPG
02Tool
Shrink PDF
So it fits through email.
8,4 MB
→1,2 MB
03Tool
Merge PDFs
Several documents, one file.
04Tool
Compress image
Lighter, without anyone noticing.
→
05Tool
Resize image
Exact dimensions, no distortion.
06Tool
QR code & password
Codes and strong passwords in a click.
Real compression, computed locally
0 %smaller
An example: an 8.4 MB photo becomes 1.2 MB — in the browser, via Canvas, without a single byte being uploaded.
BeforeAfter
0 MB0 MB
How it’s built
No server does the work. Just your browser.
Every tool computes locally — WebAssembly, Canvas and pdf.js do the work in the tab. No server ever sees your files.
Next.jsTypeScriptheic2anypdf-libpdf.jsCanvasWebAssembly