Every file tool you need.
None of the uploading.
PDF, image, video, text and developer tools that run as WebAssembly in your browser. Free, unlimited, no account. Open a tool, drop a file, and watch your network tab stay empty.
Popular tools
The ones people reach for every day.
Merge PDF Combine several PDFs into a single document, in the order you choose. On-device Compress PDF Reduce file size by rebuilding and recompressing the PDF structure, losslessly. On-device PDF to JPG Render each page as a JPG or PNG at the DPI you choose. On-device HEIC to JPG Turn iPhone HEIC photos into JPG or PNG that open anywhere. On-device Compress Image Smaller JPG, PNG and WebP with a live before/after comparison. On-device Resize Image Scale to exact pixels or a percentage with Lanczos quality; batch supported. On-device Split PDF Extract page ranges or burst a PDF into one file per page. On-device JPG to PDF Turn one or many photos into a tidy PDF with your choice of page size. On-device PNG to JPG Batch convert PNG images to JPG with quality control. On-device JSON Formatter Pretty-print, minify and validate JSON with precise error messages. On-device QR Code Generator URL, Wi-Fi, text, email and vCard codes as PNG or SVG. Never expires. On-device Word Counter Live word, character, sentence and paragraph counts with reading time. On-device
Why on-device?
Private by construction
Local tools have no upload step. The code that converts your file runs in your tab and the result is written straight to your Downloads folder. No server bill means no file-size caps, no daily limits and nothing to upsell.
Faster than a round trip, and it works offline
No queue, no upload bar, no waiting for a server. Install Kiln as an app and the tools you have used keep working on a plane or a bad connection.
Proof: open your browser's network tab, run any local tool, and you will see no request carrying your file.
Document & Design
QR codes, passwords, calculators and generators.