Rename extensions, re-encode at the quality level you need, and standardize JPG files in bulk
Drop JPEG files here
or browse files
Up to 10 files · 50 MB each
Click "Upload JPG" or drag files onto the upload area. You can select multiple files at once for batch conversion.
Files are converted to JPEG instantly. Single files are usually ready in under two seconds; larger batches take a few seconds more.
Click "Download JPEG" to save your file. Batch conversions can be downloaded all at once as a ZIP. No signup or email needed.
JPEG is supported by every browser, OS, and image editor in common use. Your converted files will open without issues anywhere.
JPEG's efficient compression keeps file sizes practical for web delivery, email attachments, and mobile viewing without visible quality loss.
Convert up to 10 JPG files to JPEG in a single session. No need to do them one at a time.
Completely free to use. No watermarks, no conversion limits, no account required.
Files are deleted immediately after conversion. We never store, view, or share your images.
Some CMSs, databases, and internal tools enforce a single extension standard — either .jpg or .jpeg, but not both. Batch converting keeps your file library consistent and prevents broken references in case-sensitive systems or APIs that validate extensions strictly.
When images come from multiple sources, their compression quality is often all over the place. Re-encoding to a specific quality setting (say, 85 for web or 95 for print) gives you a consistent baseline across an entire batch — useful for standardizing client assets, stock photos, or anything from an unknown source.
Some legacy systems, upload APIs, and server-side scripts are hardcoded to accept only .jpeg files. Batch converting the extension is faster than modifying application code — especially when you don't control the platform.
No software to install. The converter works directly in your browser on any device.
Convert up to 10 files in one session, processed in parallel. Download individually or as a ZIP.
Supports files up to 50 MB — enough for high-resolution photos and professional-quality images.
Set a specific quality level before converting. Useful when you need consistent output across files from different sources.
All uploads use HTTPS encryption. Files are permanently deleted after conversion. GDPR compliant.
Works on all modern mobile browsers. No app download required.
JPG and JPEG are the same format — same compression algorithm, same quality, same output. The only real difference is the file extension, and that difference is purely historical.
| Aspect | JPEG | JPEG |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | No | No |
| Typical File Size | Small to medium (50 KB – 5 MB for photos) | Small to medium (identical to JPG) |
| Color Depth | 24-bit (16.7 million colors) | 24-bit (16.7 million colors) |
| Best For | Photos, social media, email attachments | Same use cases — the format is identical |
| Browser Support | All browsers | All browsers |
Convert JPG to JPEG when a platform, API, or workflow specifically requires the .jpeg extension, or when you need to re-encode a batch of images at a consistent quality level.
JPG and JPEG are the same image format. The conversion between them is really about two things: changing the file extension to satisfy a platform or system requirement, and optionally re-encoding at a specific quality level to standardize a batch of images. If you've ever hit an upload error because a form only accepts .jpeg, or received a folder of images compressed at wildly different quality settings, this tool is what you need.
The format is identical — so the reasons to convert are practical, not technical.
The most common is extension compatibility. Some APIs, CMSs, and legacy systems are strict about which extension they accept. Rather than patching the application, you just convert the files. It's faster.
The second reason is quality standardization. If you've received images from multiple photographers, clients, or stock libraries, they were probably saved at different quality settings. Re-encoding to a consistent level (85 is a common web standard; 92–95 for print) gives you a uniform baseline across your entire library.
That's really it. This isn't a conversion where the output format behaves differently — it's about fitting into a specific workflow or system requirement.
Technically, nothing. Both use the same JPEG compression algorithm developed by the Joint Photographic Experts Group. The extension split happened because early versions of Windows capped file extensions at three characters, so the format became .jpg on Windows and .jpeg everywhere else. Modern systems handle both interchangeably.
In practice, you'll see .jpg used more often simply because Windows was more dominant during the years when digital cameras and photo sharing took off. Both extensions produce the same file size, the same quality, and the same compatibility.
A few things worth knowing before you convert:
**Keep your originals.** If you're re-encoding at a new quality level, the process is lossy — you can't perfectly reverse it. Always back up the source files first.
**Pick the right quality setting.** For web images, 80–85 is a good balance of size and quality. For print or archiving, use 92–95. Going above 95 produces diminishing returns with rapidly growing file sizes.
**Don't re-encode unnecessarily.** If you only need to change the extension, just rename — don't re-encode. Re-encoding an already-compressed image at the same quality level doesn't improve anything and introduces a small amount of additional compression.
**Developers and system administrators** use it when integrating with APIs or platforms that validate file extensions. Faster than updating code.
**Photographers and studios** use it to standardize batches of images received from different cameras, editors, or stock sources before uploading to a CMS or client portal.
**Content managers** use it when a DAM or CMS enforces a single extension standard across all uploaded assets.
**Anyone cleaning up a file library** where .jpg and .jpeg files are mixed together and need to be consistent.
If you need to change a .jpg extension to .jpeg, re-encode a batch at a consistent quality level, or both — PortImg handles it in seconds, directly in your browser. No software, no account, no watermarks.