When the Batch Image Converter seems to misbehave, the cause is usually one of two things: something stopped the tool from running, or it ran but the result is not usable. This guide starts with the fastest checks, then walks through the common problems and exact fixes.
Quick Checks First
- Refresh the page - a stalled session is the most common cause of nothing happening.
- Confirm the input is not empty and actually contains what you meant to submit.
- Try the smallest possible input; if that works, the issue is size, not the tool.
- Turn off browser extensions that block scripts, then reload and test again.
- Update or switch browsers if the problem repeats across sessions.
Common Problems and How to Fix Them
Some files did not convert
They are probably in an unsupported or corrupted format - check they open normally, then retry those alone.
Results are inconsistent
The sources differ (photo vs screenshot) - the settings are working, the content simply compresses differently.
Names collided after converting
Two files shared a base name - rename sources before the run or add a suffix rule.
The browser slowed to a crawl
Convert in batches of 20-30 files; very large sets strain memory.
I used the wrong settings for everything
Always convert three test files first and inspect them before committing the folder.
Transparency vanished in part of the set
Those images had alpha - choose a target format that keeps it, or split the run by content type.
When It Works but the Output Is Poor
If the tool runs fine but the result misses, the problem is almost always the brief, not the software:
- Mixing different target rules in one run
- Converting from compressed copies instead of originals
- Running a batch without checking the first result
- Losing track of which files were already converted
How to Stop It Happening Next Time
- Keep a saved prompt template for every task you repeat.
- Change one setting per generation so causes stay obvious.
- Run a two-minute sanity test with known input after any update.
- Note every failure and its fix; a short troubleshooting log pays for itself.
Still Stuck?
Reproduce the problem with the smallest possible input and note the exact steps that triggered it. A one-line description of what you did, what you expected and what happened is enough to get a precise answer from support or a colleague.
Frequently Asked Questions
How many images can I convert at once?
Dozens comfortably; very large sets work best split into smaller groups to keep memory usage sane.
Do file names stay the same?
Yes - only the extension changes, so your naming and references survive.
Are my files uploaded?
No - every image is processed inside your browser and never sent anywhere.
Can I use different settings per image?
A batch uses one rule set - split the job into groups when images need different treatment.
Related Guides
- How to Use Batch Image Converter
- What Is a Batch Image Converter and How Does It Work?
- Batch Image Converter Examples: Real Scenarios and Results
- Batch Image Converter for Photographers, Bloggers and Web Designers
- Best Batch Image Converter Alternatives Worth Trying
- Batch Image Converter Tips and Best Practices
- Is Batch Image Converter Safe? Free vs Paid
- More image conversion tools and guides