About ORF Files
Olympus RAW ORF
ORF is Olympus camera RAW format.
Family
Raster & Vector Images
Extension
.orf
MIME Type
image/x-olympus-orf
Can Use As
4F 52 46 46 00 01 00 00 4B 41 49 4A
ASCII: ORFF....KAIJ
📈 Target Minimum File Size (Guaranteed ≥ KB)
Lossless JPEG Q100 + standard COM segment padding for government & exam portals
Tap to choose your file Drop files here or click to browse
Automatic format identification and lossless transcoding across 201+ formats.
Convert to:
Detecting available formats...
Target Max File Size:
Uploading...
Processing your file...
READY!
Download File
Your file is converted & verified! Unlock instant download:
One-time secure payment via Stripe (Apple Pay, Google Pay, Card). Zero recurring subscription.
🛡️ Verification Audit
- ✓
- ✓ sRGB Color Fidelity
- ✓
Continue with this converted file (0s zero re-upload):
Batch Conversion Ready!
Your file is converted & verified! Unlock instant download:
One-time secure payment via Stripe (Apple Pay, Google Pay, Card). Zero recurring subscription.
Need to convert larger files or bigger batches right now?
Unlock up to 1 GB & priority cloud queue with 1-click Stripe checkout (Apple Pay, Google Pay, Card):
HOW ORF CAME TO BE.
ORF — Olympus Raw Format — shipped with the Olympus E-1 in 2003, the first 4/3 Four Thirds system camera. Olympus pioneered the Micro Four Thirds mirrorless standard with Panasonic in 2008, and ORF remained the raw format across both mounts. In 2020 Olympus sold its imaging business to Japan Industrial Partners, who relaunched under the OM SYSTEM brand; ORF continues unchanged.
ORF is a TIFF variant with Olympus makernotes — nothing architecturally exotic. What made Olympus distinctive was computational in-body features baked into the format: Live Composite long exposure, Pro Capture pre-burst buffering, Hand-Held High Res (16-shot pixel shift), and Live ND simulation. Many of those show up as metadata flags or multi-frame containers inside the ORF.
Technical Specifications
- MIME type
- image/x-olympus-orf
- Extension
- .orf
- Container
- TIFF/EP with Olympus MakerNote
- Sensor format
- Four Thirds / Micro Four Thirds
- Bit depth
- 12 or 14-bit
Typical Sizes & Weights
20 MP ORF (OM-1, E-M1 III)
18-25 MB
50 MP Hand-Held High Res composite
60-80 MB
80 MP Tripod High Res ORF
100-140 MB
STRENGTHS & LIMITATIONS.
Strengths
- Compact files relative to sensor size (Four Thirds is smaller than APS-C).
- Computational photography features (Live Composite, Pro Capture) baked into format.
- Stable across 20+ years of Olympus/OM SYSTEM bodies.
- In-body stabilization means ORF handheld shots rival tripod work.
Limitations
- Smaller sensor means less dynamic range than full-frame raws.
- Lossy compressed ORF is the default — hidden quality loss.
- Market share is small; fewer tutorials and fewer Lightroom profiles.
- Proprietary with no official spec.
CURIOSITIES & TRIVIA.
Olympus's "Live Composite" mode stores a long-exposure stack as a single ORF — typically 30+ minutes of astrophotography in one file.
The OM-1's "Hand-Held High Res" feature creates 50 MP or 80 MP composite ORFs from 16 rapid captures — no tripod needed.
When Olympus exited the camera business in 2020, the ORF format transferred intact to OM Digital Solutions (OM SYSTEM).
ORF files from Four Thirds cameras (2003-2008) use a 4/3 aspect ratio sensor — the crop factor is 2× vs full-frame.
Olympus's flagship bodies shoot at 14-bit ORF but store data in a compact 12-bit lossy variant by default to save card space.
Specialized Utilities for .ORF Files
Compress Image to 20KB
Compress signature scans, stamp images, and ID photos to strictly ≤ 20 KB (20,000 bytes) for strict online exam and government application portals using binary-search JPEG quantization.
Compress Image to 50KB
Compress JPG, PNG, or WebP photos to strictly under 50 KB (50,000 bytes) for passport portals, university admissions, civil service forms, and KYC uploads without changing pixel dimensions.
Compress JPG to 100 KB
Upload a JPG and download a decodable JPG at or below 100,000 bytes. If the limit cannot be reached, no output is offered.
Crop Image & Photo Resizer
Crop and resize JPG, PNG, WEBP, and AVIF images to exact pixel dimensions, social media aspect ratios, or custom print DPI online for free.
Resize Image
Resize images to exact dimensions or scale by percentage. Lock aspect ratio to prevent distortion. Supports all common image formats.
PNG Compressor — Reduce PNG Size Preserving Transparency
Compress PNG images up to 80% while preserving full alpha-channel transparency, or lock exact file size targets (20 KB, 50 KB, 100 KB).
WEBP Compressor — Optimize WebP for Core Web Vitals
Compress WEBP images for ultra-fast page loads and Lighthouse scores with fine-grained quality sliders and exact byte targets.
Favicon Generator — Multi-Resolution .ICO from PNG, SVG or WEBP
Generate a production-ready multi-resolution favicon.ico containing 16x16, 32x32, 48x48, 64x64, 128x128, and 256x256 alpha layers from any logo.
EXIF Metadata Remover
Strip hidden GPS coordinates, camera serial numbers, timestamps, and XMP/IPTC metadata from JPG, PNG, WebP, and TIFF photos before sharing online.
Image to Text (OCR)
Extract text from images using optical character recognition. Supports photos of documents, screenshots, receipts, and handwritten notes in 100+ languages.
JPG to Word Converter (OCR)
Convert scanned JPG, PNG, and WEBP images into editable Microsoft Word (DOCX) documents using 12-language optical character recognition (OCR).
CONVERT FROM ORF
Common Use Cases
Olympus photography
Related Formats
Popular comparisons
ORF vs PNG
Differences, file size, and when to choose each format.
ORF vs WEBP
Differences, file size, and when to choose each format.
ORF vs AVIF
Differences, file size, and when to choose each format.
ORF vs GIF
Differences, file size, and when to choose each format.
ORF vs BMP
Differences, file size, and when to choose each format.
ORF vs TIFF
Differences, file size, and when to choose each format.
Popular ORF conversions
The most-requested destinations when starting from ORF.
Frequently Asked Questions
ORF (Olympus RAW ORF) is an image format used to store raster graphics — a two-dimensional grid of pixels describing a picture. It is part of the raster & vector images family and designed around a specific trade-off between file size, visual fidelity, and feature support (transparency, colour depth, compression type). Photographers, web designers, and content creators choose ORF when its particular strengths match the publishing target.
Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) open ORF natively. On mobile, iOS Photos and Google Photos display ORF in the gallery when supported by the OS. If the format is rare or new, convert to JPG or PNG first — both are universally readable — using our ORF to JPG or ORF to PNG converter.
Upload the ORF to KaijuConverter and pick a target format (JPG, PNG, WebP, HEIC, TIFF, BMP, SVG, PDF). The conversion runs in the browser via ImageMagick and returns a download in seconds. No account or installation required; both input and output delete automatically within two hours.
It depends on the task. JPG is the smallest file size for photographs; PNG is lossless with transparency; ORF has its own niche that may favour colour depth, animation, or encoding efficiency over one or both of those. For the final web publish, test all three and measure file size plus visible quality on real content.
Need to Convert Gigabyte Archives or Mass Folders?
KaijuConverter delivers ultra-fast in-memory conversions for everyday tasks. For multi-gigabyte production workloads without browser bandwidth bottlenecks, explore high-throughput desktop suites.
One-time payment with zero recurring commitment: convert files up to 1 GB, OCR, PDF/A, and .ZIP batches for 24 hours.
Full 7 days of unlimited conversions, up to 2 GB per file, 100% ad-free with zero subscription.
High-throughput enterprise pipeline for files up to 2,048 MB, 50-file batches, ISO PDF/A, and priority processing.
Convert thousands of camera RAW files (CR3, NEF, ARW) to WebP, AVIF, or TIFF in one pass.
GPU-accelerated RAW development with end-to-end 16-bit ICC color profile management.