Output format
90%
Resize
Convert JPG to PDF Online Free — Fast Batch Conversion
How to Convert Images Online
1Upload JPGs
Drag and drop one or more JPG files. Upload order determines page order.
2Choose page settings
Select page size (A4, Letter, Fit-to-Image), orientation (auto-detect from EXIF), and margins.
3Download PDF
Click Convert. Download your multi-page PDF. Files deleted immediately.
Supported Image Formats
JPG
Universal format for photos. Supported everywhere, great balance between quality and file size.
PDF
Portable Document Format. Convert PDF pages to JPG, PNG or WebP images.
HEIC
Apple photo format used by iPhone and iPad. High quality with small file size.
HEIF
High Efficiency Image Format — same as HEIC, used on Apple devices.
WebP
Modern image format by Google. Up to 30% smaller than JPG with the same quality.
PNG
Lossless format that preserves every pixel. Best for screenshots and logos.
GIF
Classic format for simple animations. Supports transparency and up to 256 colors.
BMP
Uncompressed bitmap format. Maximum quality but very large file size.
TIFF
Professional lossless format used in printing and photography.
AVIF
Next-gen format with excellent compression. Up to 50% smaller than JPG.
PPM
Portable Pixmap format used in Unix/Linux environments.
HDR
High Dynamic Range format storing extended brightness data.
FITS
Flexible Image Transport System used in astronomy and science.
AVIF vs WebP vs HEIC vs JPG
Quick comparison to help you choose the right format
AVIF
- Size: Up to 50% smaller than JPG
- Browsers: Chrome, Firefox, Safari
- Transparency: ✓
- Best for: Web performance
WebP
- Size: 25-35% smaller than JPG
- Browsers: All modern browsers
- Transparency: ✓
- Best for: Web compatibility
HEIC
- Size: ~50% smaller than JPG
- Browsers: Safari only
- Transparency: ✓
- Best for: iPhone storage
JPG
- Size: Baseline
- Browsers: All browsers & apps
- Transparency: ✗
- Best for: Universal sharing
Frequently Asked Questions
- Does converting JPG to PDF lose quality?
- No — Convertify uses DCTDecode which stores your JPG data byte-for-byte inside the PDF. No pixels are decoded or re-encoded. Zero quality loss.
- Can I combine multiple JPGs into one PDF?
- Yes. Upload up to 10 JPGs. Each becomes a page in a single PDF, in the order you upload them.
- Why are my iPhone photos sideways in the PDF?
- iPhone cameras write an EXIF Orientation tag instead of physically rotating pixels. Convertify reads this tag and applies correct rotation automatically.
- How much larger is the PDF than my JPGs?
- Only 1–10 KB per page of PDF overhead. A 2.4 MB JPG becomes a 2.41 MB PDF. The total is essentially the sum of your JPG file sizes.
- My photos are HEIC not JPG — what do I do?
- iPhones default to HEIC since iOS 11. Either change Settings → Camera → Formats → Most Compatible, or use our HEIC-to-PDF converter directly.
- Can I set the page size to A4 or Letter?
- Yes. Choose A4, Letter, Legal, or Fit-to-Image (page matches photo dimensions exactly with no margins).
- Is the resulting PDF searchable?
- No. JPG-to-PDF produces image-only PDFs. For searchable text, run OCR afterward with Adobe Acrobat or Tesseract.
- My PDF is too large for email — how to reduce?
- Re-encode at 85% quality (saves 30–40%), downscale to 1500 px max edge, or convert text documents to grayscale.
- Will DocuSign accept my PDF?
- Yes, if it is under 25 MB. DocuSign recommends PDFs under 5 MB for optimal performance.
- Does Convertify delete my files?
- Yes. Files are deleted immediately after download. Nothing is stored.
Your JPG bytes go in untouched — how DCTDecode works
The PDF specification (ISO 32000) defines several image compression filters. DCTDecode is the JPEG filter — it tells the PDF reader that the image stream contains raw JPEG-compressed data. When a converter uses DCTDecode properly, it copies your JPG file byte-for-byte into the PDF image stream without decoding and re-encoding. No pixels are touched. No additional compression artifacts are introduced. The only data added is the PDF page structure: a page object dictionary, an Image XObject header, and a content stream with positioning commands. This overhead is roughly 1–10 KB per page. A folder of 30 receipt photos totaling 45 MB becomes a 45.3 MB PDF. This is fundamentally different from converters that decode your JPG to raw pixels and re-encode at a different quality — those introduce visible quality loss.
EXIF orientation — why iPhone photos appear sideways
iPhone and Android cameras do not physically rotate sensor pixels when you hold the phone in portrait or landscape. Instead they write an EXIF Orientation tag (TIFF tag 0x0112) that tells software how to display the image. There are 8 possible values: 1 is normal, 3 is 180-degree rotation, 6 is 90-degree clockwise (the most common for portrait iPhone photos), and 8 is 90-degree counterclockwise. Naive converters embed the JPG as-is without reading this tag, and the resulting PDF shows every portrait photo sideways. This is the single most common complaint about JPG-to-PDF tools. Convertify reads the EXIF Orientation tag and applies the correct rotation transform in the PDF page coordinate system — your photos display exactly as they appear in your camera roll.
Page size, margins, and mixed orientations
When combining multiple photos into a multi-page PDF, page size matters. Convertify offers standard sizes — A4, Letter, Legal — and a Fit-to-Image mode where each page exactly matches the photo dimensions with no margins. For standard page sizes, the converter fits each photo to fill the page while maintaining aspect ratio. Portrait photos get portrait pages; landscape photos get landscape pages. This auto-rotation prevents the ugly white bars that appear when a landscape photo is forced onto a portrait page or vice versa. For mixed-orientation albums, each page independently matches its photo. Margins default to zero for maximum image area; optional margins are available for print preparation.
iPhone HEIC: when your photos are not actually JPG
Since iOS 11 (2017), iPhones default to HEIC format — roughly 40–50% smaller than JPG at equal quality. When you share via AirDrop, iMessage, or email, iOS often auto-converts to JPG. But when you access photos directly via USB, Files app, or iCloud Drive, they remain as .heic files. JPG-to-PDF converters cannot process HEIC directly. You have three options: change iPhone settings to capture as JPG (Settings → Camera → Formats → Most Compatible), use the HEIC-to-JPG conversion first, or use our dedicated HEIC-to-PDF converter which handles the full chain. If your photos came from WhatsApp, Instagram, or most messaging apps, they are already JPG regardless of your camera settings.
JPG to PDF vs other image-to-PDF paths
| Feature | JPG → PDF | PNG → PDF | HEIC → PDF | WebP → PDF |
|---|---|---|---|---|
| Embedding method | DCTDecode (lossless wrap) | FlateDecode (lossless) | Transcode to JPG first | Transcode to JPG or PNG |
| Quality loss | None — byte-for-byte copy | None — lossless | Minimal (one transcode) | Minimal to moderate |
| File size overhead | ~1–10 KB per page | ~same as source PNG | ~same as equivalent JPG | ~1.5–5× larger than source WebP |
| Transparency | No (JPG has no alpha) | Yes (SMask) | No | Yes if FlateDecode path used |
| Best for | Photos, receipts, scans | Screenshots, diagrams, logos | iPhone camera roll | AI-generated images, web downloads |
Document workflows this tool is built for
Tax season receipt organization: photograph every receipt, combine into monthly or category PDFs, upload to TurboTax (5 MB limit) or attach to QuickBooks entries. Insurance claims: photograph storm damage, water damage, or accident scenes, combine into a single evidence PDF for upload to your carrier portal (typically 5–10 MB limit). Real estate listings: combine photographer JPGs and phone photos into a buyer brochure PDF. USCIS immigration applications: scan passport, visa stamps, ID documents as JPGs, combine into per-document PDFs under the 6 MB myUSCIS limit. Medical records: photograph lab results or prescription labels for upload to MyChart or patient portals (typically 10 MB, 5 files max). Job applications: combine certificates, transcripts, and recommendation letters into a single portfolio PDF for Workday or Greenhouse uploads (5 MB typical limit). Student submissions: photograph lab notebook pages, handwritten problem sets, or art projects for Canvas upload (500 MB limit).
File size and portal upload limits
Gmail allows 25 MB attachments. Outlook allows 20 MB. DocuSign accepts up to 25 MB per document. IRS Document Upload Tool accepts 15 MB per file and 120 pages per PDF. USCIS myUSCIS portal accepts 6 MB per file. State Department CEAC accepts only 2 MB. MyChart patient portals typically accept 10 MB and 5 files. TurboTax accepts 5 MB per upload. LinkedIn Easy Apply accepts 5 MB. If your combined PDF exceeds these limits, reduce by re-encoding JPGs at 85% quality (saves roughly 30–40% with minimal visible difference), downscaling to 1500–2000 px on the longest edge, or converting color receipts to grayscale (saves 50–60%).
Searchable vs image-only PDFs
A JPG-to-PDF conversion produces an image-only PDF. The text in your photographs is not machine-readable — you cannot search, select, or copy text from the document. Tax authorities, legal firms, and archival systems often require searchable PDFs with an OCR text layer. OCR (Optical Character Recognition) is a separate process that analyzes the image, recognizes characters, and adds an invisible text layer behind each page. Convertify produces image-only PDFs. If you need searchable text, run OCR afterward using Adobe Acrobat, Tesseract, or ABBYY FineReader.
Troubleshooting common JPG to PDF problems
Photos appear sideways or upside-down: EXIF Orientation tag not honored — Convertify applies auto-rotation. PDF too large for email after combining 30 photos: re-encode at 85% quality and downscale to 1500 px max edge. Photos in wrong order: files sort alphabetically — screenshot10.jpg comes before screenshot2.jpg — rename with zero-padded numbers (01, 02, 03). Mixed portrait and landscape look awkward: converter forced one orientation — Convertify auto-rotates per image. PDF rejected by IRS or USCIS portal: exceeds size limit — see compression guidance above. Scanned receipt not searchable: image-only PDF needs OCR layer. Quality much worse than originals: the converter is re-encoding instead of using DCTDecode lossless wrapping — Convertify preserves original bytes. Black borders or wide margins: page size mismatch — use Fit-to-Image mode for zero-margin output.