However, the "Privacy First" and "No Ads" claim gets eroded pretty quickly by cookies, and requests to trackers like n.clarity.ms, google-analytics and adtrafficquality.google.
Note - I don't actually have an issue with any of those things - if you wanna monetize this service through analytics and ads, that's up to you. But it's at odds with your privacy first claims.
fwiw: i have to admit, i may be getting "to old" to understand this online/service hype which took over "the it world" years ago ...
create an online-service and market it with "no upload", "local", "privacy" etc...
idk ... whats the advantage over "my" image-conversion-tool which i use heavily since decades ... if i remember it correctly, since around the late 1990ties (!) ... drummroll ... meet:
Congratulations on building this! I certainly do agree with the fact that there are a lot of sites that force you to upload, ask for your email, and sometimes even add a watermark to the image; amongst other unknown things.
Although from first look, I can tell you that there's a lot of text on the site and it's a bit too cramped. From my perspective, tools like these should get out of the way and the UX should be self-explanatory for an image "conversion" tool. Basically, just a box to select, drag/drop images, a few user inputs such as the output quality and format. That's about it. A single line at the top explaining what the tool does (and that it is local) should be good enough.
Also, the title says "PNG to JPG converter," but the rest of the site claims it can convert to quite a lot more than just those format. You can possibly change that to, as an example, something like: "ImageConverter - Convert images between formats, locally". And you can get rid of multiple pages, turning it into a single-page with all the possible output options.
As a sidenote, I've been using Mazanoke for this: https://github.com/civilblur/mazanoke. It's not my project, just something I happened to stumble upon a while ago, but it's similar to your project and works exactly like you would want it to.
From my test, the rest of it works great. Good luck!
Hey, thanks a lot for the thoughtful feedback — really appreciate you taking the time to write this
Totally agree with you on the UX point. I also believe these tools should be almost invisible — just drag, drop, adjust a few settings, and done. I initially added more text to make the privacy aspect clear (since many users don’t realize it’s 100% local), but you’re right — that could be simplified and better communicated with a single line. I’m already working on a cleaner layout with fewer distractions and a clearer “drop zone.”
Good catch on the title too! I started with “PNG to JPG converter” for SEO reasons, but as the app expanded to support multiple formats (WebP, PNG, JPG.), that label became outdated. I really like your suggested phrasing — something like “ImageConverter — Convert images between formats, locally” is a lot clearer and more accurate.
And thanks for sharing Mazanoke — hadn’t seen that before! Love that it follows the same “everything local” approach. I’ll take a closer look; maybe I can learn a few UX tricks from it as well.
Appreciate your kind words and testing it out! If you have any other UX ideas or thoughts on layout simplification, I’d love to hear them
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I love free+local. Can you add SVG->PNG with transparency? I never need help with any of the conversions you support today, but going from vector to raster would be super convenient!
https://squoosh.app/ has long been my go-to. UI is fantastic for letting me do the thing I most often am looking for, shrinking down large image files.
I'd take Squoosh every day. This provides no live image preview, no immediate feedback on file size as you adjust.
In this link, the controls dominate the page. In Squoosh, the controls are an overlay atop the actual thing you are working on. The primacy of the subject is what I want, not the tools.
There’s already a free self-hosted version of this that’s significantly more capable: https://github.com/C4illin/ConvertX. Not sure what your path to profitability is here but you may want to rethink your approach
Thanks! I really appreciate the suggestion — that’s a great idea, and I’ll definitely consider using Web Workers/WASM for handling bulks.
You clearly know your stuff — really professional feedback!
The FileReader web API enables you to make local files available to content running in the browser. This entails a file picker and, depending on the verbiage in your browser UI, that may talk about "upload." That doesn't mean anything is being sent anywhere. See MDN: https://developer.mozilla.org/en-US/docs/Web/API/FileReader
(Or that nothing is; I have not audited this code. But I vouched the parent comment to point out that browsers do offer this capability, and there's nothing facially suspicious in claiming to use it.)
Congrats on shipping.
However, the "Privacy First" and "No Ads" claim gets eroded pretty quickly by cookies, and requests to trackers like n.clarity.ms, google-analytics and adtrafficquality.google.
Note - I don't actually have an issue with any of those things - if you wanna monetize this service through analytics and ads, that's up to you. But it's at odds with your privacy first claims.
Yeah, I made a local image compressor/converter for myself that's actually private: https://github.com/blopker/alic
Good job!
Thanks for your advice, I’ll update some of the text to fix the issue
> All processing happens in your browser. Your images never leave your device - complete privacy guaranteed.
Personally I don't trust claims like this unless the source code is available, which doesn't seem to be the case from my browsing
It is easy to verify that:
One way to demonstrate that all processing is being done locally is to load the website, disconnect from the internet, and then use the site.
This is no proof that it doesn't send any data when used for conversions online.
It even could work offline, cache/store data and send it when back online.
No, it is not easy to verify without looking at the source code.
hello,
as always: imho (!)
congratulations on shipping!!
fwiw: i have to admit, i may be getting "to old" to understand this online/service hype which took over "the it world" years ago ...
create an online-service and market it with "no upload", "local", "privacy" etc...
idk ... whats the advantage over "my" image-conversion-tool which i use heavily since decades ... if i remember it correctly, since around the late 1990ties (!) ... drummroll ... meet:
ImageMagick ~ Mastering Digital Image Alchemy
* https://imagemagick.org/
its utility called "convert" does everything a "normal" person could want for image-conversion.
its FOSS, runs locally in your terminal or GUI, produces stunning results and again: no internet needed, no privacy-concerns etc...
source-code available at
* https://github.com/ImageMagick/ImageMagick
it has lots of language-integrations etc.etc.
* https://imagemagick.org/script/develop.php
just my 0.02€
ps. if i want do develop such a converter which could run locally in the browser, i would take a look at the wasm-port of imagemagick, available here:
* https://github.com/KnicKnic/WASM-ImageMagick
I think a quick tool online is more convinient for common use cases, without install software. when-ever, where-ever a browser is ok.
however, for professional requirements and use cases, a professional software is a MUST choice.
different requirements, different service to met :)
Congratulations on building this! I certainly do agree with the fact that there are a lot of sites that force you to upload, ask for your email, and sometimes even add a watermark to the image; amongst other unknown things.
Although from first look, I can tell you that there's a lot of text on the site and it's a bit too cramped. From my perspective, tools like these should get out of the way and the UX should be self-explanatory for an image "conversion" tool. Basically, just a box to select, drag/drop images, a few user inputs such as the output quality and format. That's about it. A single line at the top explaining what the tool does (and that it is local) should be good enough.
Also, the title says "PNG to JPG converter," but the rest of the site claims it can convert to quite a lot more than just those format. You can possibly change that to, as an example, something like: "ImageConverter - Convert images between formats, locally". And you can get rid of multiple pages, turning it into a single-page with all the possible output options.
As a sidenote, I've been using Mazanoke for this: https://github.com/civilblur/mazanoke. It's not my project, just something I happened to stumble upon a while ago, but it's similar to your project and works exactly like you would want it to.
From my test, the rest of it works great. Good luck!
Hey, thanks a lot for the thoughtful feedback — really appreciate you taking the time to write this
Totally agree with you on the UX point. I also believe these tools should be almost invisible — just drag, drop, adjust a few settings, and done. I initially added more text to make the privacy aspect clear (since many users don’t realize it’s 100% local), but you’re right — that could be simplified and better communicated with a single line. I’m already working on a cleaner layout with fewer distractions and a clearer “drop zone.”
Good catch on the title too! I started with “PNG to JPG converter” for SEO reasons, but as the app expanded to support multiple formats (WebP, PNG, JPG.), that label became outdated. I really like your suggested phrasing — something like “ImageConverter — Convert images between formats, locally” is a lot clearer and more accurate.
And thanks for sharing Mazanoke — hadn’t seen that before! Love that it follows the same “everything local” approach. I’ll take a closer look; maybe I can learn a few UX tricks from it as well.
Appreciate your kind words and testing it out! If you have any other UX ideas or thoughts on layout simplification, I’d love to hear them
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WTF? Privacy first?
Oh, The privacy policies is a template, Here privacy is mainly refer to the images data never upload to any server.
I love free+local. Can you add SVG->PNG with transparency? I never need help with any of the conversions you support today, but going from vector to raster would be super convenient!
Convert SVG->PNG Added,
now it support more From formats:
From format: "SVG, HEIC, AVIF, TIFF, GIF, JPEG, JPG, PNG or WebP" To format: "PNG, JPG, WEBP"
sure,I will try to add SVG support tomorrow
I build cool image tools: Here is another two tools you may found helpful
https://bulkresizeimages.online/
https://resizeimage.dev/
all these tools process image just in browser and never upload images to any server.
And more tools in the kitchen
https://squoosh.app/ has long been my go-to. UI is fantastic for letting me do the thing I most often am looking for, shrinking down large image files.
how about this ？ can shrink bulk images lighting fast: https://bulkresizeimages.online/
I'd take Squoosh every day. This provides no live image preview, no immediate feedback on file size as you adjust.
In this link, the controls dominate the page. In Squoosh, the controls are an overlay atop the actual thing you are working on. The primacy of the subject is what I want, not the tools.
I like the local first, but would be great if you'd mention the converter libs that you are using (probably jsquash wasm).
Not use other specific libraries, only the in browser canvas api.
There’s already a free self-hosted version of this that’s significantly more capable: https://github.com/C4illin/ConvertX. Not sure what your path to profitability is here but you may want to rethink your approach
Not everything is about profit :)
See also: https://vert.sh/
Very fast, would you share the libraries you're using to handle conversion and resize?
Not use other specific libraries, only the in browser canvas api.
privacy part is a joke hundreds of requests blocked by ublock on load
so now,I'm waiting for your audio converter.
when a lot of files are uploaded, I want to use web-worker(wasm).
I think that way is much better for bulk flow.
Thanks! I really appreciate the suggestion — that’s a great idea, and I’ll definitely consider using Web Workers/WASM for handling bulks. You clearly know your stuff — really professional feedback!
Awesome, sounds great. (I think img converter will not need these method, but audio, or video, or some a little heavy files probably need it.
Thanks for considering it!
upload... no uploads...
The FileReader web API enables you to make local files available to content running in the browser. This entails a file picker and, depending on the verbiage in your browser UI, that may talk about "upload." That doesn't mean anything is being sent anywhere. See MDN: https://developer.mozilla.org/en-US/docs/Web/API/FileReader
(Or that nothing is; I have not audited this code. But I vouched the parent comment to point out that browsers do offer this capability, and there's nothing facially suspicious in claiming to use it.)
Great explanation!
Maybe I should not use the text ’upload’ to avoid the confusion
Oh, I see it there in your copy. Yes, I would use a different verb there, such as "pick" or "choose" or "select."
“open”
Images never upload to any server, all images processed in your browser