Free AI image detector that shows its reasons. No sign-up for the first check.
Upload a photo or screenshot and PEA runs eight independent analyses, grades the image from 1 to 10, and lists what it confirmed and what raised concern. When there isn't enough to go on, it says so instead of guessing.
The free check is in English. Account and certificate screens are in Japanese for now; their labels are translated below.
If you create an account: what the Japanese screens say
- 1
鑑定する画像をドロップ / クリックで選択
= Drop an image here, or click to choose one
JPEG, PNG or HEIC, up to 25MB with an account. If you came from the free check, your image is already selected.
- 2
利用規約とプライバシーポリシーに同意して画像を鑑定に出します。
= I agree to the Terms and Privacy Policy and submit the image for a check
Tick the box. The English summary of the privacy policy is at /en/privacy.
- 3
この証拠を鑑定する
= Check this evidence
Press the button. The result appears in about a minute and is kept for 7 days.
- 4
鑑定書を開示・PDF保存
= Open the full report and save the PDF certificate
¥1,000 per image, charged in yen by Lemon Squeezy (international cards accepted). The certificate is sealed with a signature and a third-party timestamp.
What it checks, and what it can't tell you
Checked
- Signs of AI generation and of editing, from several independent angles rather than one detector's score
- Content Credentials (C2PA) and, where present, official provenance records
- Camera metadata (date, device, settings, location) and whether it looks consistent
- For screenshots: whether the date, reply-to, account and full screen are visible, and signs of cropping
- Signs that the image is a photo of a screen or a print, or a still from a video
Not something any detector can do
- Give a percentage. Every method misses some images, so PEA shows reasons instead of a number you would have to trust
- Prove who took a photo or when. Metadata can be edited; a certificate only fixes the file from the moment it was checked
- Prove that a post or message really existed. A screenshot can be staged before it is taken, so screenshots never get more than grade 6
- Replace a forensic examiner. For decisions that matter, treat PEA as a first check and talk to a lawyer
If you need to keep the result
A free account keeps results for 7 days. Turning a result into a certificate (¥1,000) opens the detailed findings and metadata, produces a PDF, and seals the file: its SHA-256 hash is recorded, the certificate is signed with Ed25519, and a third-party RFC 3161 timestamp is attached. Anyone can verify it by certificate number on the public verification page, which shows the record but never the image.
Questions
Is it really free and without sign-up?
Yes. The first check needs no account. You get the summary (grade and overall finding); the image and the result are not stored. A free account gives one check a day, keeps results for 7 days, and lets you turn a result into a certificate (¥1,000 per image, charged in yen by Lemon Squeezy, which accepts international cards).
Is it in English?
The free check is. Account and certificate screens are in Japanese for now: the steps above list their labels with the English meaning, and your browser's translate feature (Chrome, Safari and Edge all have one) works well on them. An English version of the whole service is in early access.
How accurate is it?
PEA doesn't publish an accuracy percentage, because no detection method catches everything and a single number hides what was and wasn't checked. Instead the result lists what was confirmed and what raised concern, and says “Not assessed” when there isn't enough to go on.
Which images work best?
The original file, as it came from the camera or as it was received, with its metadata intact. Photos of a screen or a printout, and stills from videos, lose most of the evidence and are usually marked “Not assessed”.
Who can see my image?
No one on the PEA team. Staff see an image only if you request a human review and agree to share it. The check itself is automated; parts of it send the image to external analysis services, listed in the privacy policy. Free-check images aren't stored at all.
This page is general information, not legal advice. PEA is a first check and a way to preserve a file.