TransformaHow to Batch Convert Photos on iPhone (Multiple Files at Once)
Converting photos one at a time is painfully slow when you have dozens or hundreds to process. Whether you're converting an entire vacation album from HEIC to JPG or preparing product photos in a specific format, doing them individually wastes time. Transforma's batch conversion processes up to 4 files concurrently, converting entire albums in a fraction of the time.
Quick Answer
Open Transforma, tap Select Files and choose multiple photos, pick your target format (JPG, PNG, etc.), and tap Convert. All selected files convert simultaneously with up to 4 concurrent operations, and you can save them all at once.
Why You Might Need This
- Converting photos one by one is impractical when you need to process entire albums of 50, 100, or more images for sharing or uploading.
- Preparing photos for a website, marketplace listing, or portfolio often requires a specific format and consistent quality settings across all images.
- Migrating from iPhone's HEIC format to JPG for use with non-Apple devices or legacy software requires batch processing to be practical.
- Stripping metadata from multiple photos before sharing on public platforms is only feasible with batch processing.
- Professional workflows like real estate photography, product catalogs, and documentation require uniform format conversion at scale.
Step by Step
Open Transforma and tap Select Files
Launch Transforma and tap the file selection area. The system file picker will open, allowing you to browse your Photo Library, Files app, or connected cloud storage.
Choose multiple photos
Select all the photos you want to convert. You can pick files in different formats — HEIC, JPG, PNG, TIFF, and more. There's no limit on how many files you can select for batch conversion.
Select the target format
Choose the output format you want all photos converted to, such as JPG, PNG, or HEIC. Adjust quality settings if available — these settings apply uniformly to every file in the batch.
Convert all files simultaneously
Tap Convert to start the batch process. Transforma processes up to 4 files concurrently for optimal performance on iPhone hardware. Progress is tracked for each file individually.
Save all converted files
Once conversion completes, save all the converted files at once to your chosen destination — Photo Library, Files app, or share them directly via AirDrop, email, or messaging.
Tips for Best Results
- Transforma processes up to 4 files concurrently, which is the optimal balance between speed and memory usage on iPhone hardware.
- You can mix input formats in a single batch — select HEIC, JPG, PNG, and TIFF files together and convert them all to one consistent output format.
- Quality and format settings apply uniformly to all files in the batch, ensuring consistent output across your entire album.
- Batch conversion is ideal for preparing entire photo albums for sharing — convert 100 HEIC photos to JPG in minutes rather than hours of one-by-one processing.
- Combine batch conversion with metadata stripping to prepare privacy-safe versions of entire photo collections before uploading to shared drives.
Frequently Asked Questions
How many files can I convert at once?
There's no hard limit on the number of files you can select for batch conversion. Transforma processes them in groups of 4 concurrently, so even large batches of 100+ files are handled efficiently. The total time scales linearly with the number of files.
Can I mix different input formats in one batch?
Yes. You can select HEIC, JPG, PNG, TIFF, BMP, and other supported image formats together in the same batch. They'll all be converted to your chosen output format with the same quality settings applied uniformly.
Does processing slow down with many files?
Transforma processes 4 files concurrently, which is optimized for iPhone's CPU and memory. This means 4 files take roughly the same time as 1 file. Larger batches process in groups of 4, so total time increases linearly but individual conversion speed stays consistent.
Are the same settings applied to all files?
Yes. The output format, quality level, and any options like metadata stripping are applied uniformly to every file in the batch. This ensures consistent results across your entire set of converted images.
Try It Yourself with Transforma
Download Transforma and convert your first file in seconds.
