Nanofile
Shrink files ~68% without uploading them anywhere
Nanofile is a free file compressor that runs entirely inside your browser tab. There is no upload endpoint, so your files never leave your device.
One drop zone handles 37+ formats: images (JPG, PNG, WEBP, GIF, TIFF, AVIF, HEIC), documents (PDF, DOCX, XLSX, PPTX, ODT), vectors (SVG, EPS), code (HTML, CSS, JS, XML, JSON), audio (MP3, WAV, OGG, FLAC, M4A, AAC), fonts and 3D assets (TTF, OTF, WOFF2, EPUB, GLB, STL), plus ZIP and CBZ creation. Format is detected by magic bytes, so mislabelled files still route correctly. Median reduction is around 68%.
No account, no watermarks, no daily limits, no queue. It even works with your network disconnected after the page loads.
Built by Convert Case Ltd, the team behind convertcase.net and vidshift.io.
Features
- 100% client side: no upload endpoint, so nothing to intercept
- 37 formats in one drop zone, from JPG and PDF to WOFF2, FLAC and STL
- Format auto-detection by magic bytes
- Batch processing across a whole folder
- Side by side preview before you save
- Around 68% median reduction, up to 95% on fonts
- Works offline after the page loads
- Free, no account, no watermarks, no daily limits
Use Cases
- Get a file under an email or upload size limit
- Batch optimise images for a website or store listing
- Shrink a PDF, DOCX, XLSX or PPTX for sharing
- Compress confidential documents that must not touch a third party server
- Minify HTML, CSS, JS and JSON for faster page loads
- Subset and compress web fonts
- Reduce audio for podcasts or voice notes
- Bundle files into a ZIP or CBZ
Fazier Deal
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