About Me


I played drums in 5th-grade band, but if you're looking for the Jeff Friedl who plays drums for ASHES dIVIDE, that's not me.

What is me is...

Random data points about Jeffrey Friedl
  • I currently live in Kyoto, Japan.
  • Married to Fumie since 1998.
  • Son Anthony born October, 2002.
  • Have studied the following languages in school: English, Spanish, German, French.
  • Can actually speak the following languages: English, Japanese.
  • Languages I apparently wasted a lot of time on for nothing: Spanish, German, French.
  • Born in San Diego, California.
  • Raised in Rootstown, Ohio.
  • Bachelor of Science in Math / Applied Computer Science: Kent, 1987.
  • Master of Science in Computer Science: University of New Hampshire, 1988.
  • Have been in a couple of big earthquakes (Loma Prieta '89, Kobe '95).
  • Spent 2.5 painful years writing the first edition of Mastering Regular Expressions (O'Reilly Media, 1997).
  • Spent 2 more painful years writing the second edition (O'Reilly Media, 2002).
  • Spent only 9 months updating for the third edition (O'Reilly Media, 2006).
  • Catholic.
  • Have programmed in C since 1981, Perl since 1990. Don't know C++.
  • Have used jfriedl@yahoo.com as an email address since before there was Yahoo! Mail. Still use it.
  • Wrote these blog posts.
  • Took these pictures, and these, too.
  • I lurk on Google Plus and Facebook.
  • Adobe Systems, Inc 【アドビ システムズ】 (10/2007 — 8/2008, and again 12/2009 — 5/2010)
    I consulted on issues related to Lightroom.
  • Peak Web Consulting (2007 — 2008)
    I worked on back-end infrastructure tools for top-tier bandwidth users (big Big players on the Internet, whose names I'm not allowed to mention).
  • Yahoo! 【ヤフー(アメリカの本社)】
    Sunnyvale, CA, USA (1997 - 2005)
    Architecting and engineering on the Y! Finance site, using mostly Perl/MySQL to fold, spindle, and hopefully not mutilate reams of financial data. I was employee #192. When I left )-: I was the 30th most senior (by time, certainly not influence) employee.
  • Omron Tateishi Denki 【オムロン立石電機】
    Nagaokakyou, Japan (1989-1997)
    Mostly kernel work on a four-processor symmetric shared memory system that Omron was developing. While at Omron, spent about three years as a “visiting scientist” at Carnegie Mellon University (and was mostly unimpressive to the superbly smart people there).
  • Northeastern Ohio Universities College of Medicine (NEOUCOM)
    Rootstown, Ohio (1981 - 1986)
    Worked with a first-run IBM-PC with DOS 1.0. (Unfortunately, Microsoft has not improved on their software much since then). Washed a lot of lab equipment. Did a lot of programming, including some really advanced flow cytometer control software in FORTH.

I enjoy researching a subject of personal interest, and then, because I occasionally stumble across an ability to write well, sharing the results. Examples include my long writeup on digital image color spaces, the auto-focus test chart that I developed, and a detailed Analysis of Lightroom JPEG Export Quality Settings. (See all in my list of geeky photo-tech posts.)

I also seem to have become the main provider of plugins for Adobe Lightroom, such as my plugins that allow direct export to Zenfolio, Flickr, SmugMug, PicasaWeb, Facebook, and more: see my Lightroom Goodies page for current details. I develop these on my own time, as a hobby, which is perhaps a bit odd because I don't actually use most of them in my own photo workflow. In case it's of interest, I've written up a story on how I fell into this line of handiwork: “Road to Now: My Long Path To Lightroom Plugin Development

For comments specific to a blog post, feel free to leave a comment on the post. Otherwise, feel free to send email. (Plugin logs should be sent as per this FAQ.)

The 30 most-recent comments (out of 301; see all), most recent last...

Regexif is sorely missed. Might a little fund-raising bring its return? I’ve got $5 sitting here to toss in. Just sayin’, your fans are out here. Thanks for the many years of service to the puzzle-solving geocaching community! (yes, there is such a thing, and your site has become a critical tool in our solve-box.

Whatever you do, take care!

Give this version a try… —Jeffrey

— comment by Andy on December 19th, 2016 at 12:03am JST (1 year, 2 months ago) comment permalink

hi dear.

i m a regular user of your blog. last few weeks your blogs is down (Jeffrey’s Image Metadata Viewer).

today saw your blogs thank lot dear. very useful for me. but every time is asking i m not a robot. can u pls remove that option. i hope you dear. once again thanks

No, sorry, I have to limit robots because I have to pay for the bandwidth. A few people that abuse it make it more difficult for everyone. )-: —Jeffrey

— comment by raj on December 28th, 2016 at 3:08pm JST (1 year, 2 months ago) comment permalink

Hi Jeffery

I am from Cleveland Ohio USA, and stumbled upon your site from a post on Manual Lense Forum regarding vintage Mamiya Sekor lenses, which linked to a sample of your photo’s… which btw are beayoutiful and I just wanted to say Thank You for sharing your photographic vision with the rest of us..!


— comment by Steve Hong on December 31st, 2016 at 6:59am JST (1 year, 2 months ago) comment permalink

Any chance you will develop a plugin for 500px from Lightroom?

See “Saga of Frustration: Developing (and Abandoning) a Lightroom Plugin for 500px” for your answer. —Jeffrey

— comment by Michael on February 4th, 2017 at 5:16am JST (1 year ago) comment permalink

Hi Jeffrey,

I’m having an issue with the export to Google Photos (Picasa) application. I get :

Unexpected HTTP status from Google: 501
Insert is no longer supported

I’m sure I’m doing something wrong, I’d appreciate any guidance here


Google is shutting PicasaWeb down. —Jeffrey

— comment by Garry Pycroft on February 12th, 2017 at 4:47am JST (1 year ago) comment permalink

I’ve been using both your Smugmug uploader and EXiF checker for years, although mostly I used a Safari extension called EXIFEXT for that. EXIFEXT required only a right-click and select a menu item to bring up the most important data in a popup window, but recently it stopped working. The developer says he’s not going to pay $99 a year for a free plugin certificate from Apple (and I don’t blame him a bit for that), so an update to fix the problem is not in the cards.

So if you get a little free time and can’t find any snow to track up, there’s a hole in the needs of Safari users . . . .

— comment by Michael on February 12th, 2017 at 7:09am JST (1 year ago) comment permalink

Hi Jeffrey,

Re PicasaWeb, yes I realise this is being shutdown but this App was being used to publish to Google Photos and no longer appears to work. You wrote “Uploads had suddenly stopped working, and it seemed like it was because Google had abandoned PicasaWeb, and that may still be the case, but thanks to Rob Jones over at Lightroom plugin provider New P Products for cluing me in on an upload method that still actually works.”, however I don’t see that it does work. Can you explain how we should configure the App.


Google seems to be dismantling things bit by bit. There is no information from them about it… things just stop working. The new way to upload worked when I posted that comment, but since then new things have stopped working. It’s ABUNDANTLY clear that PicasaWeb is being shut down, Google doesn’t care about those that had been using it, and Google has no interest in having photographers use Google products. This plugin is dead. Google Photos looks destined to follow the same left-to-die-on-the-vine path. —Jeffrey

— comment by Garry Pycroft on February 13th, 2017 at 4:34pm JST (1 year ago) comment permalink

Hi Jeff,

Big fan of your photography on the interwebs.

Saw this video and immediately thought of you.




I’ve never been to the area, but that lovely video certainly makes me want to visit! Thanks for sharing it. —Jeffrey

— comment by Mark on March 5th, 2017 at 12:32am JST (11 months, 15 days ago) comment permalink

Hello Jeffrey! I traveled to Dubai (amazing!!) two weeks ago and since taking 1300+ photos, have decided to open a zenfolio account for sharing….and downloaded lightroom to start editing. I am having trouble downloading your plug-in to my Mac….I am following the specific instructions, have saved the plug-in to a desktop folder labeled plug-ins- but can’t unzip???

According to your instructions, I need to unzip before using plug-in manager? Geez….I must be missing something simple….any help would be appreciated!

Thanks so much-

Perhaps your browser unzips it automatically, leaving the plugin folder all ready to be moved to wherever you want it to live on your system? —Jeffrey

— comment by Chrysa on March 29th, 2017 at 12:13am JST (10 months, 22 days ago) comment permalink

User Chrysa asked about unzipping a Zip archive on a Mac. This is not done by the web browser either automatically or manually. UnZip on a Mac is done simply by double clicking the Zip archive, by the Mac OS X, which launches the unZip program upon double click.

— comment by Michael on March 29th, 2017 at 7:54am JST (10 months, 22 days ago) comment permalink

Hi Jeff,

I recently tried to reproduce the never-ending recursion of parsing CSV, that you so eloquently discussed in The Perl Journal. (Back in the day!) Despite my attempts, I could not get any regex engine to hang on the bad input. Does this imply that Larry Wall (and other wizards) have improved their algorithms to detect simple mega-recursion cases like this?

I was trying to illustrate to a CS class what could go wrong with recursion. I fell back on Fibonacci, but I really think that the students are much more likely to use a regex in the rest of their lives than calculate Fibonacci numbers.

P.S. We met way back at an ORA author’s signing thing. Mine was about Objective-C, so you know that I am now obsolete. Fortunately, all the best features of Obj-C were carried along into Swift, so in fact I love Swift.

I know that Perl eventually got quite good at it, but don’t recall other engines that were good at it (except of course DFA-based engines), but it’s been more than a decade since I really looked into this stuff. —Jeffrey

— comment by Andrew Duncan on April 4th, 2017 at 9:19am JST (10 months, 16 days ago) comment permalink

Hi Jeffry,
here is a suggestion for your “Find Next Photo Group” plugin (part of Bag-o-Goodies):
I assume the plugin is evaluating only the time information to build photo groups.
In my opinion it should stop grouping if file extension or image dimension or rotation change.
Images with different extension/dimension/rotation should never be grouped. They can’t belong to the same burst/panorama/….

— Greetings from Germany

You’re absolutely right…. I’ve just pushed an update with this. Thanks! —Jeffrey

— comment by Martin Schultheis on April 14th, 2017 at 7:02pm JST (10 months, 6 days ago) comment permalink

i tried the Metadata-Wrangler and intend to use it and give a reasonable donation to the program …because its great and your are generous.
unfortunately, I was unable to solve the main problem i have: i need the the original image size in the metadata and not the exported size. Is that somehow possible at all?
example: image ist 4500×3000 pixel orignal dimensions; it will be exported 1500×1000 pixel; but this exported image should have the original dimensions in the metadata.
would appreciate your help

You could use the OriginalWidth token to add the data to one of the fields that MetadataWrangler can write to, e.g. “original size: {OriginalWidth}x{OriginalHeight}“. —Jeffrey

— comment by philip on April 17th, 2017 at 4:45am JST (10 months, 3 days ago) comment permalink

I emailed awhile ago to ask for help with logging into tumblr, and I don’t know if you fixed something or tumblr did, but it works now! I’m back to posting from LR and I couldn’t be happier 🙂

— comment by Alan Paone on April 23rd, 2017 at 5:48am JST (9 months, 27 days ago) comment permalink

Hi Jeffrey,
I just downloaded your zenfolio plugin (thank you so much!) and am trying to match the existing galleries from zenfolio into LR galleries.
Looks like LR matches the images and I get “53 already-associated images were reconfirmed, but no new matchups were found.” but in the collecitons it shows “0” for images. I tried all galleries and one by one gallery.

I was able to create a new gallery from LR into zenfolio and it works fine, but not for the galleries already existed on zenfolio prior to the plugin.
thanks for your help!

It sounds like you’ve yet to do step #3 (Populate) mentioned here. —Jeffrey

— comment by Olya Gary on August 10th, 2017 at 8:24am JST (6 months, 10 days ago) comment permalink

Hi Jeffrey,
I’m interested to know if there is any possibility to get additional information when a photo is “around” (let’s say in a pre-defined range) a Point of Interest (in the specific, historical sites). I’ve seen that there are APIs able to look up at specific DBs and it could be nice to have this feature too…

Greetings from Italy

I’m not sure in what context you’re asking, but this doesn’t sound like something I’d work on. —Jeffrey

— comment by Lubiano on August 21st, 2017 at 10:43pm JST (5 months, 30 days ago) comment permalink

Bonjour Jeffrey.
Bravo pour votre site, votre travail, vos photos.
Je me permets de vous écrire en français, je suis sûr que vous apprécierez.
Mon problème:
J’ai installé votre module “Google Drive”, après installation, je le configure le module en validant authentification sur GDrive.
Apparaît ensuite la mention suivante :
“fetching folder list from Gdrive” et ensuite rien ne se passe, ça affiche “not enought memory”, puis ça plante.
J’ai 16GO de ram ^^
Merci pour votre aide Jeffrey.
PS: You can reply in English if you wish

I don’t read French, sorry. Perhaps use Google Translate in the future. Next time you see this error, please send a log. Since Lr is crashing, be sure to see the last paragraph of that FAQ entry. —Jeffrey

— comment by fred on August 24th, 2017 at 5:59am JST (5 months, 27 days ago) comment permalink

Hi, Jeffrey,
I’m still using LR 5.7, because I do not need most auf the CC stuff. But when I upgraded recently to the latest Google Earth version, the map module didn’show the map any more, just the markers. It seems Adobe tries to force its customers into subscription …. Have you got any solution for this problem?
Best regards,
Robert, Vienna

It’s my understanding that this problem was caused by Google changing something out from under Adobe. It broke everything. I might be wrong, but in any case it is fixed with the most recent version of Lr6. You can still get a standalone non-cloud version of Lightroom 6, but since you have an older version of Lightroom, you should be able to get an upgrade version for half the price. You might have to contact Adobe to ask how to do that. —Jeffrey

— comment by Robert on August 28th, 2017 at 8:59pm JST (5 months, 23 days ago) comment permalink

Raleigh, NC, thanks for all of your plugins. Do you have anything to make the stacking ability more controlled by my input rather than reading all of the metadata. I shoot real estate and I always shot brackets of 3 but auto stacking is hit or miss and it takes a while to scroll through and unstack/restack and inevitably I miss an incorrect stack or two. It would be nice to have something that I can tell LR to stack them by whatever number of brackets I have shot. Mostly, in my case, every three is a stack. I always make sure that I complete a full bracket even if my flash misfires or I see a change I want to make. It seems so simple. Enfuse offers it but I am having trouble getting Enfuse to work on my mac as a standalone. It works fine as a plugin if it would only offer to create stacks in 3s.

The only thing I can think of that’s even close is the Adkins on September 10th, 2017 at 9:10am JST (5 months, 10 days ago) comment permalink

Is there anyway to have your Zenfolio plugin remove all of the Metadata (in my case, the Copyright that my wire requires is over the 100 character limit)? I am trying to automate my archiving to Zenfolio and it’s failing with the plugin due to the copyright length. I want to be able to do this without manually removing metadata.

Thanks for any help you can provide!


The plugin sends the copyright directly to Zenfolio, overriding any that may or may not be in the image metadata. I suppose you have your reasons for having such a long name in the copyright field, but your best bet is to somehow squeeze it in (or ask Zenfolio to up the limit, and then let me know so I can update the plugin). —Jeffrey

— comment by Andrew on October 11th, 2017 at 3:28am JST (4 months, 9 days ago) comment permalink

FYI – I tried using the insert for Metadata Wrangler, but that seems to only strip after exported. I need it to strip before it uploads to Zenfolio otherwise it fails. Just curious if there was a quick way to do this. I am using the old rcPlugin that that lets you combine multiple export actions into 1. Right now I have it setup to FTP files to my vendor, then create master copy locally, then create a websized with copyright locally all within the single rcExport preset. My intention is to add export to Zenfolio as a 4th item to the rcExport preset.

Thank you again for your help.

— comment by Andrew on October 11th, 2017 at 4:09am JST (4 months, 9 days ago) comment permalink


Do you know a way to insert jpg keywords into the exported files so that MacOs can use them as MacOs keywords?

Would be super nice if you could help me.


I’m not familiar with “MacOS keywords”, but if you can find a command-line tool that adds these to a file, you can use my Run Any Command plugin to invoke that command. —Jeffrey

— comment by Martin on October 19th, 2017 at 11:27pm JST (4 months ago) comment permalink

I’m disappointed to have downloaded and paid a donation for the Picassaweb uploader a day or so ago only to find the first time I used it that I get a message essentially saying “It doesn’t work , get stuffed”.
I now see that there is a wishy washy cop out on the page about Picassaweb being disabled but the fact is I looked at the version history and you have LR 7 updates so I just went and got the update as I always have in the past.
I really think you should simply disable downloading of this uploader completely rather than taking peoples money under somewhat false pretences.
I am not concerned about the money and I will definitely be continuing to use and recommend your Flickr uploader but this does leave something of a bad feeling from s customer who has been using your products since I think LR4.
Just wanted to let you knwo my feelings.


— comment by Richard on October 23rd, 2017 at 4:06pm JST (3 months, 28 days ago) comment permalink

Hi, Jeffrey:
Love your website and thank you for sharing and also I love you mention “Karma”! Thanks again!
Your sincerely,

— comment by aosaet on October 28th, 2017 at 10:16am JST (3 months, 23 days ago) comment permalink

hi jeffrey just installed LRClassicCC when installed it apparently wiped out my connections to Flickr, Facebook, Zen, etc. that i have purchased from u. not sure what to do now. in the past on each program i have been allowed to reauthicate, but do not get that message. have attempted to re download but to no avail. appreciate your comments and recommendations. jeff lantz images.

When you say “wiped out my connections”, what exactly do you mean? Lr7 (LR Classic CC) upgrades your Lr6 catalog, and all the publish services should be intact… there shouldn’t be any changes. However, if you’d placed the downloaded plugin files inside the Lr6 app, as some people do but no one should, then you’d have to re-download them, unzip them, move them to where they really will live (e.g. a “LightroomPlugins” folder in your “Documents”), then point the Plugin Manager at them. Now everything should be as it was in Lr6. If this is not the case, please send more details (and perhaps screenshots). —Jeffrey

— comment by Jeff Lantz on November 9th, 2017 at 7:07am JST (3 months, 11 days ago) comment permalink

Jeffrey i did not ck the box re email and would prefer to receive yr response there. since i have over 3500 images on flickr and facebook usder yr links if i can not use yrs for future connections how do i transfer those images to a new flickr and facebook without losing them. thanks again i am still a big fan of your work, but need help. jeff

— comment by Jeff Lantz on November 9th, 2017 at 8:02am JST (3 months, 11 days ago) comment permalink

hi jeffrey. i downloaded ur update last week. though i was not asked for the receipt # of paypal. messages i get now 1 when attmpting to reload all of ur programs flickr, facebook, zen. smug. “the versionof flickr u have does not work in LR upgrade” 2. when attempt to connect each of them “error occurred while reading schema for PM for flickr. when i attempt to add in LRplugins above messages. thanks. sorry to be so much trouble. love the programs have used them for yrs. jeff lantz

It sounds as if you’re not pointing Lightroom’s plugin manager at the newly-downloaded plugin copies. Perhaps it’d be most safe to delete all copies of all plugins that you have on your system, to ensure that there are no old copies lying around, then download fresh copies, unzip them, move them to where you want them to live on your system, then point the Plugin Manager at them. Your plugin data will remain, as it’s in the catalog and not the plugin files. If they had been registered prior to your Lightroom upgrade, you’ll have to re-register them (as described here), or leave them unregistered, but you can generate new registration codes with 1-cent transactions, if you like, so it shouldn’t be such a big deal. —Jeffrey

— comment by Jeff Lantz on November 13th, 2017 at 2:25am JST (3 months, 7 days ago) comment permalink

have removed all of your plug ins from LR and documents have downloaded and paid now 2 times for downloads have 2 registration # from paypal when i go to finder your downloads are not there since i removed them in clearing prior and current downloads. i am going to your site and download another for flickr. should i crerate a new folder in my documents folder and then move each of yours to that folder. in the past i have merely gone to LR clicked on add a plugin and you were there, but it is not working this time. i guess i am getting old and maybe you need to give me a specific sequence to use in LR. sorry to be so much trouble but yours is the only system i have used for years. thanks for you patience. jeff

Yes, create something like a “Lightroom Plugins” folder somewhere that will stay, such as inside your “Documents” folder, and put unzipped plugins there. Lightroom plugins are confusing because unlike normal apps where you can delete the download after installing, you don’t really “install” Lightroom plugins, but merely tell Lightroom that they exist at such-and-such a place on your disk, so they have to remain. Note that you don’t need new registration codes each time you download… only after a major Lightroom upgrade. If you reinstall previous plugins, just reuse the prior code. —Jeffrey

— comment by Jeff Lantz on November 17th, 2017 at 8:47am JST (3 months, 3 days ago) comment permalink

hi when i download the flickr app i copied the registation number, went to LR plugin mgr clicked on add but there is nothing on the screen which allows me to add the registration #. it would not let me add anything from u. it went to a previous plubin in the system but would not let me add your registration # in fact there was no reference to you at all. i do have a flickr and facebook reference in the plugin section but not yours. i have various plugin On1,Maphn,HDR,Perfect clear etc. but can not add u. help jeff

Could you be confusing my plugin with Lightroom’s built-in Flickr plugin? —Jeffrey

— comment by Jeff Lantz on November 17th, 2017 at 9:07am JST (3 months, 3 days ago) comment permalink

The Zenfolio plug-in is excellent but I do not seem to be able to populate the LR Zenfolio galleries with the existing photos already in my online Zenfolio gallery. When I go to plug-in extras then Zenfolio and select “Associate Images Automatically”, the plugin starts matching up the photos with those at Zenfolio then returnes with the error, “Assertion Failed: Packed”

Unfortunately, this is a known bug in Lightroom, but they haven’t come up with a fix yet. —Jeffrey

— comment by Fred on November 20th, 2017 at 5:23pm JST (3 months ago) comment permalink
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