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FastRawViewer Version 1.1 Release Candidate is here!

Adds folder tree, filmstrip,

and many other improvements

FastRawViewer 1.0.5

If you already know what version of FastRawViewer you need, please download now. If unsure, please see below for the explanations how to choose the right version of FastRawViewer for your specific hardware and operational system, with links to downloads.

Download links

Mac OS X

Windows 7 - 8.1 (DirectX graphics)


User manual

There is a single manual for both Windows and Mac OS X versions (it comes with the installation, too)

How to choose the proper version of FRV

Mac OS X

FastRawViewer for Mac OS X requires any Intel-based Mac (excluding Mac Mini 2005) with Mac OS X 10.6+ installed. We recommend a video card with OpenGL 2.1 support (that's every native Mac video card that works with OS X 10.6). An OpenGL emulator will be used if such a video card is not present in the system; some of the advanced features of FastRawViewer will take significant time to render without hardware support for OpenGL.

Download link


FastRawViewer for Windows requires a computer with SSE3-compatible CPU (that is, manufactured after 2004) and not-so-ancient video card. It works on a variety of 32/64 bit Windows platforms: XP, Vista, 7, 8, 8.1 (we suggest Windows 7 or 8.1/64-bit).

FastRawViewer for Windows is available in 2 versions:

  • Graphics based on Microsoft DirectX – this version will work with any video card that supports DirectX 9.0 and higher (DirectX 9.0c support or later is recommended)
  • Graphics based on OpenGL – requires a video card with at least OpenGL 2.1 support. Works fine on modern discrete graphics card with up-to-date drivers, slightly faster than DirectX version. This version may experience compatibility problems with older hardware and/or outdated drivers. OpenGL version is recommended for these graphics cards: Nvidia Geforce GTX4xx and newer; AMD/ATI: Radeon HD5xxx and newer.

Download links

Windows 7 - Windows 8.1 (DirectX graphics)

Legacy Version (Windows XP - Windows Vista)

Windows 7 - Windows 8.1 (OpenGL graphics)

If you are experiencing sluggish behavior, or any graphic issues, updating video drivers may be very helpful. In fact, we suggest to keep your video drivers up-to-date in any case.

Some links to help detecting which card you have in your system:


FastRawViewer 1.0.5 (Build 539)

New Action: Menu - File - Clear _Rejected folder

Allows one to permanently delete (not just send to Trash/Recycle bin) the contents of the _Rejected folder.

It will ask again if you are sure, you will need to set the checkmark, and after that the OK button will become active. The second checkbox controls the deletion of Read-Only files.

Attention! Mac OS X does not support access control for the FAT file system (memory cards), and all files will be deleted regardless of read-only checkbox state.

The Clear _Rejected folder action is unaccessible and invisible in the menu if the _Rejected folder is set as global. A shortcut cannot be assigned to this action.

Better handling of external modified folder

Processing situations, when the contents of the current folder are changed by an external program while the user is attempting to navigate to the next/previous file:

  • if all files are deleted (or the current folder is renamed): FRV issues a warning and stops displaying the current file;
  • if some of the files are deleted and the requested navigation to next/previous file is impossible, then:
    • if the current file is also deleted, FRV will try to maintain position in the list: if the deleted file was, for example, the 10th, but it is deleted and thus the relative positioning is impossible, FRV will go to the 9th or 11th file, correspondingly (if they exist)
    • b) if the current file is not deleted, but moving forward/back is impossible ( because all files before/after have been deleted) FRV will beep, showing a question mark instead of the current file number, and will forbid moving in the direction where the attempt has been made and proven impossible.

New Preference: Other - Use high speed preview for Fujifilm X-Trans

As obvious from the name, this preference speeds up work with X-Trans (at the cost of quality, otherwise the preference wouldn't exist).  When first launching and when resetting to default settings, this one will automatically turn on on computers:

  • with processors that are older than Intel i7,
  • for i7 (i3, i5) of the first generation, if the number of cores is less than 4 (hyper-threaded cores are counted in as real).

For faster devices, this setting is unnecessary, as the speed is already acceptable with standard unpacking.

Minor changes and bugfixes

  • When copying a file while choosing a folder, the chosen folder will become the second (not first) in the list of Recent folders. The first in the list of Recent folders will remain, as it should be, the current folder.
  • New camera support:  Olympus E-M5 Mark-II, including HiRes (64Mpix) files.
  • A bug has been fixed when dealing with poorly formatted Panasonic MakerNotes.
  • Bug fix: after calling up the preference dialog on Mac OS X, some of the informational windows would occasionally disappear.

FastRawViewer 1.0.4 (Build 530)


New Actions
  • Menu - File - Copy to folder (ask destination) (standard hotkey: C)
  • Menu - File - Copy to folder (same destination) (standard hotkey: Shitf-C)

Functions analogously to Move to folder, but copies the file instead of moving it.   The "Same destination" folder is shared for the Copy and Move actions.

Like Move to folder, this function never rewrites a file, if it exists. Like Move to folder and Move to _Rejected, the XMP-file will be copied along with the RAW file, if it exists, and in RAW+JPEG mode, the JPEG file will be copied as well.

Global (absolute) _Rejected subfolder

Using Preferences - File Handling - Subfolder for rejected files one can assign not just a subfolder, but an absolute path as well. An absolute path follows the rules below:

  • Windows: absolute paths start with 'C:' (local path, any Latin letter can be used instead of 'С') or with '\\' (network paths)
  • OS X: absolute path starts with '/'

The dialog to set the absolute path is not supported, one must type it out manually.

New Action: Menu - File - Close File

Stops all background decoding processes; changes the current folder to %HOME%/Pictures (if it exists), or to %HOME%, "closes" the currently opened file.

Intended, primarily, to support the proper un-mounting of an external drive (flash card, camera, removable drive, etc).

Other changes
  • EXIF data extraction (exposure, ISO setting, lenses) from the XMP blocks built into the RAW files.As one of the results, we now display Leaf shooting data.
  • The CCT/Tint calculation has been improved, especially for low color temperatures ("warm" light).
  • DXO Optics 10 and Capture One 8 have been added to the list of programs, automatically recognized during the first start of FRV.
  • Added camera support:
    • Panasonic GF7
    • Sony A7 II

FastRawViewer 1.0.3 (Build 522)


  • Support for HiDPI in Windows
  • User control over the font sizes in the bottom bar and in the right column through Preferences:
    • Preferences - Interface - Bottom bar font size
    • Preferences - Interface - Information windows size
  • Added support for new Panasonic camera DMC-TZ70 A.K.A. DMC-ZS50
  • New setting in Preferences: "File Handling - Ignore extensions when file browsing"

    This setting allows the user to supply a list of file extensions. Files having the extensions listed here:
    • will be ignored during file browsing;
    • not displayed in the "Open file" dialogue window.

Bugs fixed

  • EXIF settings: the options "Do not show empty values" and "Show row labels" are now saved correctly.

    The default setting to show row labels is forced during the first start, overriding the previous status of the setting.
  • The message warning that the trial period is expired is not overlaid with the Splash Screen.
  • Upon the start, the program checks if its window will be visible on one of the monitors; and if not - it will start with the default layout.

    (That is, if the previous session used a second monitor, which was later unplugged, the program window will be visible).

FastRawViewer 1.0.2 (Build 503)

Significant changes

  • The decoding of lenses from MakerNotes for Canon, Fujifilm, Leica, Nikon, Panasonic, Pentax, Samsung and Sony cameras, as well as most cameras with fixed lenses. The EXIF/Lens field now looks correct in the majority of cases.
  • New Actions
    • Menu - File - Open first file in folder (default shortcut Ctrl-Shift-left arrow)
    • Menu - File - Open last file in folder (default shortcut Ctrl-Shift-right arrow)

New camera support

  • Fujifilm X-T1 Graphite Silver
  • Hasselblad Stellar II
  • Panasonic DMC-CM1
  • Samsung NX1

Minor Changes

  • The new setting 'Use System file/folder open dialog', default is ON. If you turn it off, a different (more compact) dialog is used when opening files.
  • (Windows) The new setting 'Other - Faster program close', is intended for the very rare cases when FastRawViewer's process is not completed in a reasonable amount of time.
  • When attempting to open a file, the reading of which is not allowed because of the standard permissions (access rights) setting, a warning is issued.
  • When flipping to a file, the reading of which is forbidden (through permissions or the Access Control List), "no permission for reading" is added to the list of reasons for not opening a file.
  • Debug log: different buttons for copying "as text" and "as html" to clipboard, to allow more flexibility while choosing the program for paste operation.
  • Alt-letter hotkeys have been added for access to the main/upper menu. If an analogous shortcut is added for access to some function of the program (through the Keyboard Shortcuts editor), then it will have priority over the upper menu. Therefore, when using the standard keyboard layout, there is no fast access to the Window menu, since the Alt-w command is assigned to the manual white balance setting tool.

Bugs fixed

  • Exposure correction: Autoexposure - autoexposure did not work for the first file opened in the session.
  • Exposure correction: Keep from prev. file: On the first RAW file during the session (if it doesn't have exposure correction saved in XMP) No Correction was always applied (but taking into account the Adobe hidden correction setting)
  • Mac OS X; full-screen mode:
    • OS X 10.7-10.10: Turning off "Use Lion Fullscreen" in the settings removes the option of going to fullscreen mode using the system GUI (the buttons on the window's upper bar)
    • All versions: independent of the method of switching to full-screen mode (window maximization on OS X 10.6, or turning on Lion Fullscreen for later versions), the upper bar menu buttons, the program hotkey, the buttons in the status bar, the state of the "checkmark" in Menu - View - Fullscreen and Close Fullscreen is synchronized with the state of the window.
    • When turning off Use Lion Fullscreen in the settings, if the program was in fullscreen mode then it returns to it.
    • When turning on Use Lion Fullscreen in the settings, if the program was in the maximized mode, the Menu - View - Fullscreen checkbox is unchecked.
  • OS X: Dropping a file onto the FRV application icon and starting FRV through Open With now works in all cases.
  • OS X 10.10: Dragging a file into the FRV application window now works in all cases.
  • OX X: The application version displayed in Info always corresponds to the current application version.
  • Kodak DCS ProBack: In several cases, the preview ("Internal JPEG") of the file was incorrectly decoded.

FastRawViewer 1.0.1 (Build 488)

Changes to Auto Exposure Control

The Auto Exposure indication and the behavior of the program now default to align with Adobe RAW converters (Camera Raw/Lightroom).

New setting Image Display - Apply Adobe hidden exposure correction

If this setting is "on" (default):

  • Exposure correction is aligned with the one that is indicated in Adobe converters (that is Adobe Baseline exposure compensation is added),
  • If the exposure correction is set to zero or is "off", the brightness of the image is aligned to the brightness to the Adobe converters with the exposure correction set to zero.
The setting Keep exposure correction on next file is replaced with the following.

Exposure correction on file open:

  • No correction (default) - if selected, no exposure correction is applied
  • Autoexposure - if selected, Automatic exposure correction is applied
  • Keep from prev. file - if selected, the exposure correction is inherited from the previous file (for the first file in session exposure correction is set to zero).

New setting does not allow to fully emulate the behavior of previous versions for the case if automatic exposure correction for the first file + "keep correction on next" were in use; to handle this, please press Shift-A once in working session (on first file).

Automatic exposure correction logic reworked and enhanced.

New settings in Preferences - Image display

  • for Automatic exposure correction:
    • Fixed exposure shift - if selected, a fixed exposure correction is applied  (Adobe hidden exposure compensation is added to the value)
    • ETTR-style autoexposure (shift histogram to the right) - if selected, the Auto Exposure correction is calculated so that the histogram is shifted to the right.
  • to control the ETTR-style Auto exposure you can set the limit:
    • Unlimited - no limit
    • Hard limit - a hard limit
    • Virtual ISO (default) - soft limit, which depends on the ISO setting at which the image was captured.
Settings for Adobe Exposure Difference are moved from XMP tab to Exposure tab:

Replaced: Use Builtin Adobe/FRV exposure difference when possible and Adobe/FRV exposure difference for other files

With: Image Display - Override Adobe exposure correction to NN EV

Most likely you don't need this setting because all the offsets for the exposure correction between Adobe convertors and FRV for the cameras that are supported by Adobe are already in FRV.

If you want to preserve the legacy ("FRV 1.0" and earlier) behavior, please do the following:

  • Disable Apply Adobe hidden exposure correction
  • Set Exposure correction on file open to Autoexposure or Keep from prev. file

Other changes

  • The setting for Image Zoom on next file is moved to Interface tab
  • For OS X Color Management is enabled by default.
  • The description of the system monitor profile is displayed in Preferences - Color Management.
  • Deleted settings
    • Start in fullscreen
    • Remember maximized window state

    The program now starts with the screen size it had previously. The last size of the program window before going to fullscreen/maximize is stored in the settings.

  • Increase exposure: shortcut Alt+= is added
  • New setting for EXIF display window: Show row labels (enabled by default).

    If it is turned off, only the values from EXIF will be shown and the names (like Shutter, Aperture, etc.) will be omitted. This is intended for the case when only few fields from EXIF are displayed and their meanings are obvious without annotations.