CloudConvert Alternative for Images: No Daily Credits, No Upload

Ten conversions. That is the free CloudConvert allowance for a day, and it goes fast when you are converting a folder of PNGs to WebP one file at a time.

The credit resets tomorrow. Or you buy a package. Either way you are counting something, and for a task as ordinary as changing an image from one format to another, counting feels like the wrong activity.

Let us be upfront about the shape of this comparison though. CloudConvert is not really an image tool. It is a general file converter that happens to include images, and for most of what it does, ZeroPNG is not an alternative at all. More on that below, because it is the honest part.

What ZeroPNG does differently

The ZeroPNG Image Converter runs in your browser. You drop files in, pick a target format, and your own CPU does the encoding. Nothing is uploaded, nothing is metered, and there is no account.

The practical difference on a batch is time. CloudConvert has to receive your files, queue them, convert them, and send them back. Free accounts also sit in a lower priority queue. A local converter skips all of that: a folder of 100 PNGs starts converting immediately and finishes in whatever time your laptop takes.

Once the page has loaded once, it works offline too. Handy on a plane, or on hotel Wi-Fi that struggles to load a text file.

CloudConvert vs ZeroPNG, as of August 2026

These free-tier numbers come from CloudConvert's own pricing page in August 2026.

Feature	ZeroPNG	CloudConvert (free)
Where it runs	Your browser	CloudConvert's servers
Files uploaded	None	Every file
Daily limit	None	10 conversion credits, reset daily
Max file size	20 MB per image	1 GB
Queue priority	Not applicable	Priority processing is a paid feature
Account needed	No	Yes
Formats supported	Images only	212 formats across 11 categories
Video, audio, documents	No	Yes
API and cloud storage	No	Yes
Works offline	Yes, after the first visit	No

On credits: a conversion costs at least one credit, and longer jobs cost roughly one credit per extra minute of processing. Some heavier conversion types carry a higher base cost than one. Paid packages never expire, while monthly subscription credits do not roll over.

What ten credits gets you in image work

Ten files. That is it, because an image conversion finishes in seconds and still costs the one-credit minimum. The credit system is designed around jobs that take real processing time, like transcoding video, so a task that takes half a second is charged the same as one that takes fifty.

Nothing dishonest about that. It just means the free tier is a poor fit for the specific job of converting a folder of images, which is the job that brings most people to this page.

Which image format should you convert to anyway

Since you are here to change a format, a quick opinion, because the answer has actually settled down.

WebP is the default you should reach for. It is smaller than both JPEG and PNG, it handles transparency, and browser support is effectively universal now. AVIF is smaller again, often meaningfully so, but encoding takes noticeably longer and support is a little behind WebP. Use AVIF where page weight is the thing you are being measured on and you can afford the encode time.

PNG still earns its place for screenshots, logos and anything with sharp text or flat color. JPEG remains the right call when you need something that every piece of software written in the last thirty years can open. JPEG XL is excellent, genuinely, but browser support is thin enough that it is still an archival and workflow format rather than a web one.

One trap worth flagging: converting a JPEG to PNG does not restore quality. The detail the JPEG discarded is gone. You will get a bigger file containing exactly the same visible information.

Where CloudConvert is clearly the better choice

This one is easy to write because it is not close.

Anything that is not an image

CloudConvert lists 212 formats across 11 categories: 42 image formats, but also 28 video, 21 audio, 23 document, 39 archive, 22 e-book, 11 slide, 8 spreadsheet, 10 vector, 5 font and 3 CAD. If you need MOV to MP4, DOCX to PDF, EPUB to MOBI, FLAC to MP3, or a DWG opened at all, ZeroPNG cannot help and never will. Browsers are not built to transcode a two-hour video or parse a CAD drawing. Go use CloudConvert. That is not false modesty, it is the correct answer.

Camera RAW, PSD, and other formats browsers cannot decode

Even within images, CloudConvert reaches further. ZeroPNG can only work with what your browser can open: PNG, JPG, WebP, AVIF, GIF, SVG, and HEIC through a dedicated tool. Hand us a Nikon NEF or a layered PSD and nothing happens. CloudConvert converts both.

Very large files and automation

CloudConvert accepts 1 GB files on the free tier and removes the limit entirely on paid plans. ZeroPNG rejects anything over 20 MB, because a browser tab that tries to decode a file much larger than that tends to run out of memory and die. CloudConvert also has a proper job-based API and connectors for cloud storage, so it can sit inside an automated workflow. ZeroPNG has no API at all.

They are also a serious company about it

CloudConvert has been running since 2012, built by Lunaweb GmbH out of Munich. Their security page states that files are kept only for processing and deleted immediately afterwards, that transfers are SSL encrypted, that they are bound by GDPR as a German company, and that their information security management system is ISO 27001 certified by TÜV Süd. If you have to use a server-side converter, that is the profile you want. The privacy trade-off is still real, because your file still leaves your machine, but they are not hiding the ball.

How to switch, for image work

1. Open the Image Converter and drop your files in. PNG, JPG, WebP and AVIF, in any direction.
2. Pick the output format and quality. WebP is the safe modern default. AVIF is smaller and slower to encode.
3. Convert the whole batch, then download everything at once.

For specific jobs there are focused tools: AVIF Converter, JPEG XL Converter, HEIC Converter for iPhone photos, SVG to PNG, and Images to PDF if you were using CloudConvert to bundle photos into a document.

Common questions

How many free conversions does CloudConvert allow?

Ten conversion credits per day, resetting daily, with a 1 GB file size cap. Most simple conversions cost one credit, so think of it as roughly ten conversions a day. Priority processing is reserved for paid plans.

Can ZeroPNG convert video, audio or documents?

No. It is images only. If your job involves video, audio, spreadsheets, e-books, archives or CAD files, CloudConvert is the right tool and this page is not trying to talk you out of it.

Is converting images in the browser slower than using a server?

Usually faster, for images. You skip the upload, the queue and the download. AVIF encoding is the exception, since the AV1 codec is heavy and takes real CPU time no matter where it runs.

Does ZeroPNG offer a conversion API?

No. There is no server-side processing, so there is nothing to call. CloudConvert's API is well documented and built for exactly that use case.