If you have ever tried to upload an iPhone photo to a form or portal and been told the file type is not supported, you have hit the HEIC problem. Every photo taken on an iPhone since iOS 11 is saved as a HEIC file by default. HEIC (High Efficiency Image Container) is a compressed image format that produces smaller file sizes than JPEG at similar quality, but it is not accepted everywhere.
When a form, landlord, employer, or government portal asks for a document in PDF format, you cannot just attach a HEIC image. The solution is to convert it to a PDF directly, without downloading an app and without changing your iPhone's camera settings.
Why HEIC files cause problems
Apple introduced HEIC as the default format because it typically produces files around 40–50% smaller than equivalent JPEGs at the same quality. A standard iPhone photo in JPEG would be around 3–5MB; the same shot in HEIC is usually 1.5–2.5MB. Over thousands of photos, this adds up to significant storage savings.
The problem is compatibility. Windows before version 10 (and even some Windows 10 configurations) cannot open HEIC without installing a codec. Many web forms, government portals, and business systems simply reject the format. PDF is far more universally accepted, which is why converting HEIC photos to PDF is often the most practical solution.
The fastest way: convert HEIC to PDF in Safari on iPhone
PDFWhisk's HEIC to PDF tool accepts HEIC files directly. Safari on iPhone and Mac decodes them natively; in Chrome, Edge or Firefox (including on Windows, which often can't open HEIC at all) the page loads a decoder that runs on your device. You do not need to convert to JPEG first, and you do not need to install anything. Here is the workflow:
- Open pdfwhisk.com/heic-to-pdf in Safari on your iPhone. Safari gives the smoothest photo picker and decodes HEIC itself.
- Tap the upload area. The photo picker will open. Select one or more photos from your camera roll. iPhones automatically provide the HEIC originals.
- Check the page order if you are combining multiple photos. Use the up and down arrows next to each file to move it.
- Tap Convert to PDF. The conversion runs entirely in your browser, nothing is sent to any server.
- Tap Download. The PDF saves to the Files app. From there, you can attach it to an email, upload it to a form, or share via AirDrop or WhatsApp.
The whole process takes under 30 seconds for a single photo. For a batch of five or six photos, expect around 60–90 seconds depending on your phone model and photo resolution.
Does it work with multiple HEIC photos?
Yes. You can select as many photos as you need in one session. Each photo becomes a page in the final PDF. This is especially useful when you need to submit multiple sides of an ID document, several payslips, or a series of photos showing property damage or defects.
If you are combining photos taken at different orientations (some portrait, some landscape), the tool applies the rotation each photo was saved with, so portrait shots stay portrait. Open the PDF once before you submit it: it is much easier to spot a wrong page now than to re-upload a corrected version later. If a whole page is the wrong way round, Rotate PDF fixes it.
What about HEIC photos on iPad?
The same workflow applies on iPad. Open pdfwhisk.com/heic-to-pdf in Safari on iPad, select your photos from the Camera Roll or Files app, and create the PDF. The page size will be set to A4 by default, which works well for document submissions.
Alternative: change iPhone to save as JPEG
If you want to stop the HEIC problem at the source, you can change your iPhone's camera format. Go to Settings, then Camera, then Formats, and choose "Most Compatible" instead of "High Efficiency". This saves new photos as JPEGs instead of HEIC.
The trade-off is storage: JPEG files are roughly twice the size of HEIC at similar quality. If you have 10,000+ photos, this can matter. For most people, the compatibility benefit is worth it, but the browser-based HEIC to PDF conversion is a perfectly good alternative if you want to keep the efficient format and just fix the issue when it comes up.
Specific use cases where HEIC to PDF conversion is most useful
Visa and immigration documents
UK Visas and Immigration (UKVI) portals require supporting documents as PDFs. If you need to submit a photo of a passport biodata page, a utility bill, or a letter, converting the HEIC photo to a PDF is necessary. The UKVI portal typically allows files up to 6MB, a PDF created from a HEIC photo is usually well under 2MB.
Rental and tenancy applications
Landlords and letting agents often ask for photo ID, payslips, and bank statements by email or through a portal. Converting HEIC photos to PDF makes the submission look more professional and avoids the "cannot open this file type" response that slows the process down.
Insurance claims
Photo evidence for a home or vehicle insurance claim is typically submitted by email or through an insurer's portal. PDFs are widely accepted; HEIC files often are not. A single PDF containing all your evidence photos is also easier for the claims handler to work with than a set of loose image files.
Job applications and reference documents
If you have taken a photo of a certificate, a letter, or a reference document that you need to attach to an application, converting it to PDF ensures the recipient can open it on any device regardless of their operating system or software.
Privacy: why browser-based conversion is the right approach here
iPhone photos often contain metadata beyond just the image: location data (if location services are on), date and time, and device information. Photos of passports, ID documents, and financial papers are among the most sensitive files anyone handles. Uploading a HEIC photo to a random online converter means sending that data to an external server.
PDFWhisk processes the conversion entirely in your browser using JavaScript. The photo and any embedded metadata never leave your device. The PDF that downloads is created locally from your original file, no cloud processing, no server storage. See the Privacy Proof page for a technical breakdown of exactly how this works.
Summary: HEIC to PDF in three steps
Open pdfwhisk.com/heic-to-pdf in Safari, or in Chrome or Edge on a computer. Select your HEIC photos. Download the PDF. Need separate JPG files instead? Use HEIC to JPG. The conversion runs locally in your browser, takes under a minute for most photos, and produces a clean, shareable PDF that any device or portal will accept.