# Unmarkr — full reference > Unmarkr removes AI watermarks from images: visible generator logos, invisible > pixel watermarks (Google SynthID), and provenance metadata (C2PA, EXIF, the > "Made with AI" tag). Metadata removal is free; paid credits > unlock full-resolution and advanced (logo + SynthID) removal; a > key-authenticated HTTP API covers scale. - Home / free tool: https://unmarkr.io/ - API docs: https://unmarkr.io/docs - OpenAPI: https://unmarkr.io/openapi.json - Pricing: https://unmarkr.io/#pricing ## Pricing (credits; 1 credit ≈ one full-resolution image) Subscriptions: - Basic: 300 credits / month - Pro: 750 credits / month - Creator: 1,800 credits / month One-time credit packs (never expire): - Starter: 200 credits - Plus: 600 credits - Max: 1,300 credits A full watermark removal (logo + SynthID) costs 4 credits. ## API - `POST https://unmarkr.io/api/remove` — Bearer key auth; multipart `image` + `mode` (`standard` default, or `full`). - Returns cleaned image bytes; `X-Unmarkr-Removed` header lists what was removed. - Costs 1 credit (`standard`) or 4 credits (`full`). Errors: 401, 402, 429, 503. - Spec: https://unmarkr.io/openapi.json # Guides # SynthID Remover > Remove Google's hidden SynthID watermark — and the provenance metadata that ships with it. Images from Google Gemini, Imagen and Veo carry two kinds of mark: a visible corner sparkle you can see, and SynthID — an invisible pattern woven across the pixels that survives screenshots, crops and re-saves. On top of that sits C2PA “Content Credentials” metadata that labels the file as AI-made. Unmarkr takes off all three so the image is yours to use, visibly and invisibly. You generated it — you should own it. ## What it removes - **Hidden watermark (SynthID)** — The invisible signal baked into the pixels, removed — not just the visible logo. - **Visible sparkle** — Google's corner ✦ mark, cleaned from the image. - **Provenance metadata** — C2PA Content Credentials, EXIF and XMP “Made with AI” tags stripped. - **Full resolution** — You get a clean, full-resolution image back — no shrinking, no logo overlay. ## How it works 1. **Drop your image** — Upload, paste, or drag in a PNG, JPG or WebP. It's scanned instantly. 2. **See what's inside** — We show the visible marks and AI metadata we can read — free, no account. 3. **Clean it** — Remove the visible marks and metadata, or run advanced removal for the hidden mark, then download. ## FAQ ### What is SynthID? SynthID is Google DeepMind's watermarking for AI-generated media. It embeds an imperceptible pattern into the pixels (and audio/video) that stays detectable after common edits — separate from any visible logo or metadata. ### Can you really remove SynthID? SynthID is deliberately built to survive cropping, compression and small edits, so no tool can promise 100% removal on every file. Unmarkr's advanced removal rebuilds the image so the hidden signal is replaced rather than copied; results are strong but not guaranteed. ### Does removing it reduce quality? Visible + metadata removal keeps your pixels intact at full resolution. Advanced (hidden-mark) removal returns a faithful full-resolution copy. ### Is my image uploaded? We don’t keep your images — files aren’t stored after you download. Removal runs on our servers only when you choose it, and files aren't kept. ### Is it free? Removing AI metadata is free. Deep removal — the hidden SynthID watermark and the visible logo — uses credits (new accounts start with 7 free). ### Is removing a watermark legal? You should only remove marks from images you created or have the right to edit. Unmarkr is for owning your own generated content, not for misrepresenting others' work. --- Last updated: 2026-09-01. Source: https://unmarkr.io/synthid-remover # Remove SynthID > Strip Google's invisible SynthID watermark and the AI provenance that travels with it. SynthID is the part of a Google AI image you can't see: an invisible pattern in the pixels that keeps flagging the file as AI-generated long after the visible logo is gone. Removing the corner sparkle isn't enough on its own. Unmarkr scans your image for free, shows what it finds, and cleans the visible marks, the metadata and the hidden SynthID signal so the result is truly yours. ## What it removes - **The invisible signal** — SynthID lives in the pixels — advanced removal rebuilds the image so it's replaced. - **The visible mark** — Gemini/Imagen corner sparkle removed cleanly. - **The paper trail** — C2PA, EXIF and XMP “Made with AI” tags stripped from the file. - **No quality loss** — Full-resolution output, no overlay, no shrink. ## How it works 1. **Add your image** — Drop, paste or link a PNG, JPG or WebP — scanned instantly. 2. **Review findings** — See the visible marks and AI metadata we detect, free and instantly. 3. **Download clean** — Remove visible + metadata, or clean the hidden mark, then save the result. ## FAQ ### Why isn't removing the visible logo enough? The visible sparkle and the invisible SynthID signal are separate. Deleting the corner logo leaves SynthID in the pixels, so the image can still be flagged as AI-made. ### Is removal guaranteed? No. SynthID is engineered to survive edits, so no tool can guarantee complete removal on every image. Our advanced removal is effective but honest about its limits. ### Do you keep my files? We don’t keep your images — files aren’t stored after you download. Cleaned images aren't stored on our servers. ### What formats work? PNG, JPG and WebP, up to 25 MB. ### Is it legal? Only remove marks from content you own or are allowed to edit. --- Last updated: 2026-09-01. Source: https://unmarkr.io/remove-synthid # Gemini Watermark Remover > Take off Google Gemini's corner sparkle, its hidden SynthID mark, and its AI metadata. Every image from Google Gemini (and Imagen) comes stamped: a small ✦ sparkle in the corner, an invisible SynthID pattern in the pixels, and C2PA metadata that says “Made with Google AI.” Unmarkr removes all three. Check any Gemini image free to see exactly what it carries, then clean it at full resolution. ## What it removes - **The ✦ sparkle** — Gemini's visible corner logo, removed and reconstructed. - **Hidden SynthID** — The invisible in-pixel watermark, cleaned via advanced removal. - **“Made with AI” tags** — C2PA / EXIF / XMP provenance stripped from the file. - **Any Gemini image** — Works on Gemini, Imagen and Nano Banana output. ## How it works 1. **Drop the Gemini image** — Upload, paste or link it — scanned instantly. 2. **See the marks** — We surface the visible sparkle and the AI metadata for free. 3. **Clean & download** — Remove visible + metadata, or clean the hidden mark, then save. ## FAQ ### Where is the Gemini watermark? There are up to three: a visible ✦ usually in a corner, an invisible SynthID pattern across all the pixels, and C2PA metadata inside the file. ### Can you remove the invisible one? Advanced removal rebuilds the image so the hidden SynthID signal is replaced. It's effective but, like any SynthID tool, not guaranteed on every image. ### Does the sparkle removal look clean? Yes — the corner region is reconstructed to match the surrounding image, not blurred over. ### Is my image uploaded to check it? We don’t keep your images — files aren’t stored after you download. ### Is it free? Removing AI metadata is free. Deep removal — the hidden SynthID watermark and the visible logo — uses credits (new accounts start with 7 free). --- Last updated: 2026-09-01. Source: https://unmarkr.io/gemini-watermark-remover # Nano Banana Watermark Remover > Clean Google's Nano Banana (Gemini) images — visible sparkle, hidden SynthID and metadata. “Nano Banana” is Google's latest Gemini image model, and its output carries the same marks as the rest of the Gemini family: a visible corner sparkle, an invisible SynthID pattern, and C2PA “Made with AI” metadata. Unmarkr removes all of them so your Nano Banana images are fully yours. Scan any image free to see what's inside first. ## What it removes - **Visible sparkle** — The corner ✦ removed and reconstructed. - **Hidden SynthID** — The invisible in-pixel mark cleaned via advanced removal. - **AI metadata** — C2PA / EXIF / XMP provenance stripped. - **Full resolution** — Clean image back at full size. ## How it works 1. **Add your image** — Drop, paste or link it — checked instantly. 2. **See findings** — Free scan shows the visible mark and AI metadata. 3. **Clean it** — Remove visible + metadata, or clean the hidden mark, then download. ## FAQ ### Is Nano Banana the same as Gemini? Yes — it's a Gemini image model, so its images carry the same visible sparkle, invisible SynthID and C2PA metadata. ### Can the hidden mark be removed? Advanced removal replaces the in-pixel signal by rebuilding the image; strong results, not guaranteed on every file. ### Do you store my image? We don’t keep your images — files aren’t stored after you download. Cleaned files aren't kept. ### What's the cost? Scanning is free; cleaning uses credits, and new accounts get free credits to start. --- Last updated: 2026-09-01. Source: https://unmarkr.io/nano-banana-watermark-remover # ChatGPT Image Watermark Remover > ChatGPT images usually have no visible logo — but they carry hidden C2PA metadata. Remove it. Images from ChatGPT and DALL·E rarely show a visible logo, so they look clean — but the file still contains C2PA “Content Credentials” metadata that flags it as AI-generated, along with EXIF/XMP tags. Unmarkr scans your image free to reveal that hidden metadata, then strips it so the file no longer announces how it was made. ## What it removes - **C2PA Content Credentials** — OpenAI's provenance manifest removed from the file. - **EXIF / XMP tags** — “Made with AI” and generator tags stripped. - **No visible logo? Still marked** — The scan shows what's hidden inside even when nothing shows on screen. - **Pixels untouched** — Metadata removal keeps your image identical at full resolution. ## How it works 1. **Drop the image** — Upload, paste or link a PNG or JPG — scanned instantly. 2. **See the metadata** — We list the C2PA / EXIF / XMP tags found, free. 3. **Strip it** — Remove the metadata and download the clean file. ## FAQ ### Do ChatGPT images have a watermark? Usually not a visible one, but they embed C2PA metadata (Content Credentials) that identifies them as AI-generated. Some platforms read this. ### Does ChatGPT use SynthID? SynthID is Google's system. OpenAI images rely mainly on C2PA metadata, which Unmarkr strips completely. ### Will the image change? No — metadata removal leaves the pixels identical at full resolution. ### Is my file uploaded to scan it? We don’t keep your images — files aren’t stored after you download. ### Is stripping metadata legal? Only edit images you own or are allowed to. This is for owning your own generated content. --- Last updated: 2026-09-01. Source: https://unmarkr.io/chatgpt-watermark-remover # C2PA Metadata Remover > Strip Content Credentials and “Made with AI” tags that travel inside your image file. C2PA “Content Credentials” are a provenance manifest embedded in a file that records how an image was made — increasingly attached by AI tools and cameras. Alongside EXIF and XMP tags, they can quietly flag your image as AI-generated wherever it's read. Unmarkr shows you exactly which provenance tags a file carries, then removes them cleanly without touching the picture. ## What it removes - **C2PA manifest** — The embedded Content Credentials provenance removed. - **EXIF & XMP** — “Made with AI”, generator and source-type tags stripped. - **Every format** — Works on PNG, JPG and WebP. - **Pixel-identical** — Only the metadata goes — the image stays exactly the same. ## How it works 1. **Add the file** — Drop, paste or link it — scanned instantly. 2. **See the tags** — We list the C2PA / EXIF / XMP provenance found, free. 3. **Strip & save** — Remove the metadata and download the clean file. ## FAQ ### What are Content Credentials (C2PA)? A cryptographically-signed record of an image's origin and edits, embedded in the file. Many AI generators attach one labelling the image as AI-made. ### Does removing metadata change the image? No — the pixels are untouched and stay at full resolution. Only the metadata is removed. ### Does this remove invisible watermarks too? Metadata removal handles C2PA/EXIF/XMP. Invisible pixel watermarks like SynthID need advanced removal — see our SynthID remover. ### Are my files kept? We don’t keep your images — files aren’t stored after you download. Cleaned files aren't stored. --- Last updated: 2026-09-01. Source: https://unmarkr.io/c2pa-metadata-remover # Veo Watermark Remover > Clean Google Veo's visible mark, hidden SynthID and provenance from AI video. Google Veo videos carry the same marking philosophy as Gemini images: a visible logo, an invisible SynthID signal across the frames, and C2PA provenance metadata. Unmarkr already removes the visible mark and metadata from frames and images; full end-to-end video cleaning is rolling out. Scan a frame free to see what a Veo clip carries. ## What it removes - **Visible mark** — Veo's on-frame logo removed and reconstructed. - **Hidden SynthID** — The invisible per-frame signal targeted by advanced removal. - **Provenance metadata** — C2PA / EXIF / XMP tags stripped. - **Frames today, video soon** — Clean exported frames now; full-video support is on the way. ## How it works 1. **Export a frame** — Save a frame from your Veo clip as an image and drop it in. 2. **Scan it** — See the visible mark and AI metadata for free. 3. **Clean it** — Remove visible + metadata, or clean the hidden mark, then download. ## FAQ ### Can Unmarkr clean a whole video yet? Image and frame cleaning is live; full end-to-end video cleaning is in progress. For now you can clean exported frames. ### Does Veo use SynthID? Yes — Google applies SynthID to Veo video as well as Gemini images, alongside a visible mark and metadata. ### Is removal guaranteed? SynthID is built to survive edits, so no tool guarantees complete removal. Our approach is effective but honest about limits. ### Do you store uploads? We don’t keep your images — files aren’t stored after you download. --- Last updated: 2026-09-01. Source: https://unmarkr.io/veo-watermark-remover # AI Watermark Remover > One tool for all three AI marks: visible logos, hidden watermarks, and provenance metadata. AI images can carry up to three separate marks: a visible logo, an invisible watermark baked into the pixels (like Google's SynthID), and C2PA “Made with AI” metadata inside the file. Most tools only handle one. Unmarkr handles all three. Scan any image free to see what it carries, then clean it at full resolution — because you generated it, you should own it. ## What it removes - **Visible logos** — Corner sparkles and on-image marks removed and reconstructed. - **Hidden watermarks** — Invisible in-pixel signals like SynthID cleaned via advanced removal. - **Provenance metadata** — C2PA, EXIF and XMP “Made with AI” tags stripped. - **Any generator** — Gemini, Imagen, Nano Banana, ChatGPT/DALL·E and more. ## How it works 1. **Drop your image** — Upload, paste or link a PNG, JPG or WebP — scanned instantly. 2. **See what's inside** — A free scan reveals the visible marks and AI metadata. 3. **Clean & download** — Remove visible + metadata, or clean the hidden mark, at full resolution. ## FAQ ### What kinds of AI watermark are there? Three: visible logos you can see, invisible pixel watermarks like SynthID, and metadata provenance such as C2PA Content Credentials. They're independent, so removing one doesn't remove the others. ### Can you remove invisible watermarks? Advanced removal rebuilds the image so an invisible signal like SynthID is replaced. It's effective but, by the nature of these watermarks, not guaranteed on every file. ### Is it free? Removing AI metadata is free. Deep removal — the hidden SynthID watermark and the visible logo — uses credits (new accounts start with 7 free). ### Is my image uploaded just to scan it? We don’t keep your images — files aren’t stored after you download. ### Is removing AI watermarks legal? Only remove marks from images you created or have permission to edit — this is about owning your own content. --- Last updated: 2026-09-01. Source: https://unmarkr.io/ai-watermark-remover # Blog - [Remove the Gemini Watermark from Images (Free Check)](https://unmarkr.io/blog/remove-gemini-watermark) — Google’s Gemini and Imagen images carry a corner sparkle plus hidden provenance tags. Here’s how to take both off cleanly. - [Remove C2PA & “Made with AI” Metadata from Images](https://unmarkr.io/blog/remove-c2pa-made-with-ai-metadata) — Content Credentials (C2PA) and EXIF tags travel inside the file and flag images as AI-generated. Here’s how to remove them. - [Clean ChatGPT Image Metadata & Remove C2PA Watermarks](https://unmarkr.io/blog/remove-chatgpt-image-watermark) — ChatGPT image output usually has no visible logo — but it does carry C2PA metadata. Here’s how to clean it. - [What Is SynthID? Removing Google’s Invisible Watermark](https://unmarkr.io/blog/what-is-synthid-invisible-watermark) — Beyond logos and metadata, some AI images carry an invisible watermark woven into the pixels. Here’s the honest picture on SynthID. - [Removing AI Watermarks in Bulk with an API](https://unmarkr.io/blog/ai-watermark-removal-api-bulk) — Cleaning images one by one doesn’t scale. Here’s how to remove AI watermarks and metadata in bulk with an API. - [Can ChatGPT Remove Watermarks? Here’s What Actually Works](https://unmarkr.io/blog/can-chatgpt-remove-watermarks) — People keep asking ChatGPT to strip watermarks. Here’s why it can’t do it reliably — and what does. - [How to Remove the Gemini “Nano Banana” Watermark](https://unmarkr.io/blog/remove-gemini-nano-banana-watermark) — “Nano Banana” is Google’s Gemini image model — and it marks images in three separate ways. Here’s how to clear them. - [How SynthID Works: Google’s Invisible AI Watermark Explained](https://unmarkr.io/blog/how-synthid-works) — SynthID is the hardest AI watermark to deal with because it lives in the pixels. Here’s how it actually works. - [Removed the Watermark but Still Flagged as AI? SynthID vs Visible Marks](https://unmarkr.io/blog/removed-watermark-still-flagged-as-ai) — You stripped the logo and metadata, but it’s still detected as AI. That’s SynthID — a different layer entirely. - [AI Tag Remover: Strip “Made with AI”, C2PA & EXIF Labels](https://unmarkr.io/blog/ai-tag-remover) — The “AI” tag on your image isn’t always visible. Here’s how to find and remove every provenance tag. - [Is It Legal to Remove AI Watermarks?](https://unmarkr.io/blog/is-it-legal-to-remove-ai-watermarks) — The short answer: it depends on whose image it is and why. Here's the plain-English version. - [How to Tell if an Image Is AI-Generated](https://unmarkr.io/blog/how-to-tell-if-image-is-ai-generated) — A visible logo is the obvious tell — but the real signals hide in the metadata and the pixels. Here's how to check. - [SynthID vs C2PA: The Two AI Watermarks Explained](https://unmarkr.io/blog/synthid-vs-c2pa) — One lives in the pixels, the other in the metadata. Confusing them is why people think a watermark is gone when it isn't.