AI-Generated Images (Midjourney/DALL·E) and Metadata: What Hidden Information Is Inside Your Files?

If you use Midjourney, DALL·E 3, or Stable Diffusion, you probably assume your “secret sauce” — those prompts you spent hours perfecting — stays private once you download the final image.

Here’s the uncomfortable truth: AI-generated images are packed with hidden data. Every word you typed into the prompt box. Every parameter you tweaked. In some cases, your actual identity. All of it is silently embedded in the file, invisible to the naked eye but trivially extractable by anyone who knows where to look.

In this guide, we’re pulling back the curtain on the metadata hiding inside your AI art — and explaining why prompt leaking is becoming a serious privacy and intellectual property concern for creators, studios, and agencies.

1. Midjourney: Your Prompt Is Embedded in the File

Midjourney is the most popular AI art platform on the planet. It’s also one of the chattiest when it comes to metadata.

When you download a PNG from Midjourney, the system stores generation data inside PNG text chunks — a standard part of the PNG file format that acts like a hidden pocket for arbitrary data. Open one of these files with any metadata viewer, and here’s what you’ll typically find staring back at you:

• The full prompt. Every word. Every stylistic keyword. Every reference artist you name-dropped.
• Generation parameters. Your aspect ratio (--ar 16:9), stylize values (--s 750), chaos setting, and the exact model version (--v 6.1).
• Your Discord identity. In some versions, your Discord username or Artist ID gets written into the “Artist” or “UserComment” metadata fields.

Why This Matters

If you share a raw Midjourney file — on a portfolio site, via email to a client, in a public gallery — anyone can extract your exact prompt and replicate your style in under 30 seconds. No reverse engineering required. No guessing. They just read the file.

For freelance artists and agencies whose competitive advantage IS their prompt craft, this is essentially giving away your trade secrets for free.

Key Takeaway: Never share raw Midjourney PNGs. Always audit and strip metadata before distribution.

2. DALL·E 3 and the Rise of C2PA Content Credentials

OpenAI takes a more formal — and in some ways more concerning — approach. Since early 2024, DALL·E 3 images (including those generated through ChatGPT) carry C2PA Content Credentials.

C2PA stands for Coalition for Content Provenance and Authenticity, an industry standard backed by Adobe, Microsoft, Intel, and others. Unlike Midjourney’s relatively casual metadata dump, C2PA is cryptographically signed. Think of it as a tamper-proof birth certificate for your image.

Inside that certificate:

• Provenance: Cryptographic proof that this image was generated by an AI model — specifically, OpenAI’s DALL·E 3.
• Model identification: The exact system that created it.
• Timestamp: Precisely when the image was generated.

The Double-Edged Sword

On one hand, C2PA is a meaningful tool for fighting disinformation. It lets platforms and viewers verify whether an image is authentic or AI-generated — important in an era where fake photos can influence elections and ruin reputations.

On the other hand, it creates a permanent, cryptographically verifiable paper trail that ties your image back to its AI origins forever. Even if you edit the image, composite it into other artwork, or try to pass it off as traditional digital art, the C2PA signature persists — and platforms like Facebook, Instagram, and Google are actively building systems to read and surface these credentials.

Key Takeaway: C2PA is designed to be unstrippable by casual methods. If you need to remove it, you need a tool that operates at the binary level, not just an image editor.

3. Stable Diffusion: The Seed Number Is the Blueprint

Because Stable Diffusion is often run locally (via Automatic1111, ComfyUI, or similar interfaces), its metadata situation is even more detailed — and potentially more dangerous.

By default, most Stable Diffusion frontends embed the following into every generated PNG:

• The prompt and negative prompt. Exactly what you asked for, and exactly what you told the model to avoid.
• Sampling method and steps. The technical recipe — Euler a, DPM++ 2M, 30 steps, CFG scale 7.5 — everything another creator needs to reproduce your workflow.
• The seed number. This is the nuclear one. The seed is the exact random number used to initialize the image generation. With the prompt, model, and seed, anyone can recreate your exact image, pixel for pixel.

Think about what that means. If you sell AI-generated assets or use them in client work, and you deliver the raw file, you’re not just delivering the image. You’re delivering the manufacturing blueprint. Your client — or their next designer — doesn’t need to license anything from you again. They have the recipe.

Why Should You Audit Your AI Metadata?

For most creators, the metadata in AI images represents a significant intellectual property leak. Consider these scenarios:

• You sell AI assets on marketplaces. Your raw files contain the exact prompts someone needs to cut you out of the equation.
• You produce AI art for clients. The delivered file gives them — and any future designer they hire — the ability to replicate your style without paying you.
• You share work on social media. Platforms are increasingly reading AI metadata labels. Some are already deprioritizing content flagged as AI-generated in their algorithms.
• You compete in a crowded niche. Your prompts ARE your moat. Leaking them means losing your competitive edge overnight.

And it’s not just about competition. Privacy matters too. If metadata includes your identity or account information, every image you share becomes a digital fingerprint pointing back to you.

How to Check (and Clean) Your AI Images

You don’t need to be a programmer to see what’s hiding inside your files. The most reliable approach is simple: audit before you publish.

Using ExifAudit for AI Privacy

Before you upload your latest Midjourney masterpiece to a public gallery or send that DALL·E 3 asset to a client, run it through ExifAudit. The tool operates entirely in your browser — your files never leave your device, never touch a server, and are never stored.

Here’s what ExifAudit lets you do in three clicks:

1. Reveal Hidden Prompts. Instantly see whether your Midjourney or Stable Diffusion prompts are embedded in the file. No guessing. No command line. Just drag, drop, and read.
2. Detect C2PA Credentials. Check if your DALL·E 3 image is carrying an AI-generated digital signature — the kind that Facebook and Google use to label content.
3. One-Click Scrubbing. Strip every prompt, seed number, parameter, and personal identifier from the file. What you download is a high-quality image with zero hidden information — same pixels, none of the baggage.

And because everything happens locally in your browser, there’s no risk of your private prompts or images being exposed through a server breach. You’re not uploading anything. You’re just reading what’s already there — and choosing what to keep.

The Bottom Line

AI-generated images aren’t just pixels on a screen. They’re data-rich files that carry the story of their creation — your creative process, your technical decisions, and in some cases, your identity. Midjourney embeds your prompts in PNG chunks. DALL·E 3 cryptographically signs its output with C2PA credentials. Stable Diffusion hands over the entire recipe, seed number included.

Whether you’re protecting trade secrets from competitors, maintaining your reputation on social platforms, or simply valuing your privacy, the first step is the same: audit your files.

Stop leaking your prompts. Head over to exifaudit.com and take control of your AI metadata today.

Frequently Asked Questions

Do all AI-generated images contain metadata?

Not all — but the three most popular platforms do. Midjourney PNGs embed prompt data in text chunks by default. DALL·E 3 images carry C2PA Content Credentials. Stable Diffusion outputs (from Automatic1111 and ComfyUI) embed full generation parameters including prompts, seeds, and model settings. Some newer tools and online generators strip metadata automatically, but the default behavior across the industry is that metadata is embedded.

Can I remove AI metadata by converting to JPEG?

Sometimes — but it’s not reliable. Converting a PNG to JPEG will strip PNG-specific text chunks (which Midjourney uses), so Midjourney prompts may be removed. Cependant, C2PA Content Credentials (used by DALL·E 3) are designed to survive format conversions, resizing, and even partial image edits. Converting to JPEG also introduces quality loss due to compression. A dedicated metadata removal tool like ExifAudit strips all hidden data at the binary level without touching your pixels.

Does screenshotting an AI image remove its metadata?

Generally yes — a screenshot creates a brand new image with no metadata from the original. But this comes with serious trade-offs: you lose resolution, color accuracy, and the original file quality. For professional or commercial work where image quality matters, screenshotting is a poor solution. A proper metadata audit tool gives you a clean file at full resolution.

What is C2PA and why is it in my DALL·E images?

C2PA (Coalition for Content Provenance and Authenticity) is an industry standard backed by Adobe, Microsoft, OpenAI, Intel, and others. It embeds cryptographically signed “Content Credentials” into images that prove their origin — in DALL·E 3’s case, that the image was AI-generated by OpenAI. It’s designed to combat disinformation by making AI-generated content traceable, but it also creates a permanent, verifiable link between your image and its AI origins that social platforms can read.

Can someone recreate my exact image from the metadata?

Yes — if the metadata includes the prompt, model, and seed number (as Stable Diffusion outputs do), anyone with the same model and settings can regenerate your image pixel for pixel. Midjourney prompts don’t include seeds by default in earlier versions, but newer versions may. This is why stripping metadata before sharing or selling AI assets is essential for protecting your intellectual property.

Is it safe to use an online metadata remover?

Most online tools upload your files to their servers — which means your private images and prompts are exposed to a third party. ExifAudit is different: everything runs locally in your browser. Your files are never uploaded to any server. The processing happens entirely on your device, using JavaScript running in your own browser. This means your images, prompts, and any sensitive data they contain never leave your computer.