ERF Converter
FileFlip converts ERF files into 62 other formats entirely inside your browser, using ImageMagick, MuPDF and Pandoc compiled to WebAssembly. The ERF file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert an ERF file?#
- Drop your ERF file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert ERF files online?#
Yes, because nothing is uploaded. FileFlip converts ERF files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a ERF file#
FileFlip converts ERF into 62 formats with ImageMagick, MuPDF and Pandoc, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | Image Files |
|---|---|
| File extension | .erf |
| FileFlip support | Read only, so it is a source rather than a target |
| Conversions available | 62 |
| Engines | ImageMagick, MuPDF and Pandoc |
| Downloaded to your browser | 14.1 MB on the first conversion, then cached |
What is an ERF file?#
An ERF file holds the raw color filter array data from an Epson R-D1 or R-D1s digital rangefinder, wrapped in the TIFF/EP structure alongside an embedded thumbnail and Exif metadata.
Keep a file as ERF only if it is an original R-D1 or R-D1s capture you are archiving unchanged.
Convert ERF to DNG or TIFF for long-term storage or editing in current software, since the only two cameras that ever wrote the format stopped being made years ago.
The ERF file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
ERF questions people ask#
What camera shot this ERF file?
ERF files come from only two cameras, the Epson R-D1 rangefinder released in 2004 and its 2006 update the R-D1s. Epson built the R-D1 with Cosina, pairing a Leica M-mount rangefinder body with Epson's own sensor electronics and image processing.
Can I still open an ERF file?
Yes. ERF files open in RawTherapee, darktable and digiKam through the libopenraw decoding library, and ExifTool reads their embedded Exif metadata. Epson never updated its own raw software after leaving the camera market, so a current raw processor is the practical option.
What should I convert ERF files to?
Converting ERF to DNG or TIFF is worth doing for long-term storage, since Epson exited the camera body business in 2014 and no software vendor has a reason to add new support for a format tied to two discontinued cameras.