JUL202601BUSINESSTECHNOLOGYNew Study Reveals More Than Half of PM₂.₅ Emissions in Ludhiana Originate from Unmitigated Fuel UseA new study released today by the International Forum for Environment, Sustainability and Technology (iFOREST) has identified unmitigated fuel use as a major and largely overlooked contributor to air pollution in the Indo-Gangetic Plain (IGP). The report, titled "Reducing Emissions from Unmitigated Fuel Usage: Data-Driven Strategies for Air Quality and Climate Action in IGP", presents the first district-level assessment in India to quantify unmitigated fuel use and the associated emissions across sectors. Unmitigated fuel refers to the combustion of any fuel, whether for productive end uses or other purposes, without the application of air pollution control devices (APCDs).Read Fullopen_in_new100% Free · No Signup · No Watermark
AAC to Opus Converter
Convert AAC to Opus online for free — no signup, no watermark, instant download.
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Max 100MB per file · Up to 10 files
About this tool
Free AAC to Opus Converter — No Signup, No Watermark
FlipFileZone lets you convert AAC audio files to Opus entirely in your browser — no software to install, no account required, and no watermark on the output. The converter runs on our servers so even low-powered devices can handle large files. Your files are automatically deleted after download, keeping your data private.
How to use — step by step
1
Upload your AAC audio file
Click the upload area or drag and drop your AAC file. You can add multiple files at once for batch conversion.
2
Opus is pre-selected
The converter automatically selects Opus as the output format. Switch to any other format using the dropdown if needed.
3
Click Convert
Hit the Convert button. Your audio file is processed securely on our servers in seconds.
4
Download your file
Download your Opus file immediately once conversion is complete. Files are deleted from our servers right after.
Other formats you can convert AAC to
Features
bolt
Fast conversion
Convert AAC to Opus in seconds — server-side processing, no waiting.
no_accounts
No signup required
Start converting immediately. No account, no email address, no credit card.
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No watermark
Your Opus output files are clean — we never add branding or watermarks.
lock
Private & secure
Files are transferred over HTTPS and automatically deleted after download.
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Batch conversion
Upload and convert multiple files at the same time — download them all as a ZIP.
devices
Works on any device
Runs in any modern browser on Windows, Mac, Linux, iOS and Android.
Frequently asked questions
Is the AAC to Opus converter free?
Yes — FlipFileZone is 100% free with no account required, no credits, and no hidden charges.
Is there a file size limit for AAC to Opus conversion?
There is no hard file size limit. Very large files may take slightly longer depending on your internet speed.
Can I convert multiple AAC files to Opus at once?
Yes. Drop multiple AAC files into the converter and they will all be converted simultaneously. You can then download everything as a single ZIP.
Does the AAC to Opus conversion affect quality?
You can choose the output bitrate and sample rate before converting to control file size vs quality.
Are my files kept private?
Your files are uploaded over an encrypted HTTPS connection and automatically deleted from our servers after you download them. We do not store, analyse or share your files.
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