runlocally

Small tools that run locally in your browser.

Convert, build, read and trim files — entirely on your device. Free, open source, and nothing is ever uploaded.

🔒 No upload. Your files never leave your device.

Images

HEIC to JPG

Convert iPhone HEIC photos to JPG or PNG.

WebP to JPG

Convert WebP images to JPG or PNG.

ZIP & archives

Create ZIP

Bundle your files into a single .zip archive.

ZIP Viewer

See what's inside a .zip without extracting it.

Fix ZIP Filenames

Repair garbled (mojibake) filenames in a .zip.

PDF

Split PDF

Extract page ranges into a new PDF.

Merge PDF

Combine several PDFs into one.

Audio & video

Remove Silence

Cut silent gaps out of an audio file.

Video to MP3

Extract the audio track from a video as MP3.

Why "run locally"?

Privacy here is structural, not a promise — there is no server to upload to.

✓Nothing is uploaded. Files are read and processed in your browser.
✓Works offline. Each tool is a PWA you can install and use without a network.
✓Open source (MIT). The code is public — you can read exactly what runs.
✓No accounts, no tracking pixels. Just the tool and your files.