Free tool
Logo trademark search
Check if a logo is already trademarked: upload it and this free similar logo checker finds the closest registered logos across 3.8 million U.S. logos and the international (Madrid System) register, a reverse image search for the trademark record. Helps you spot a §2(d) likelihood-of-confusion problem before you file.
Data scope: USPTO design marks (applications and registrations with images, ~3.8 million) plus international registrations filed through WIPO's Madrid System (275,753 with logo images on record, growing daily as the feed lands). Both registers are searched three ways: by image structure (pHash), by what the image depicts (CLIP), and by the wording we read in your logo, matched against each mark's registered text, so a restyled wordmark is found even when the graphics differ. EU marks filed directly at EUIPO and unregistered/common-law logos are not covered.
What you get
- Free, no account: every search is free and needs no signup.
- Two registers at once: compares your logo with 3.8 million U.S. and international (WIPO Madrid) trademark logos.
- Search by image: upload a PNG, JPG, GIF or WebP file; photos and screenshots work.
- Three ways to match: by shape, by what the picture shows, and by the words inside the logo.
- Details for every match: similarity score, status, owner, classes, filing year and a link to the official record.
- Filters: by what you will use the logo for (Nice class), by status (active only) and by filing date; each match says why it matters or not.
- Report and link: a dated PDF report, and a shareable results page kept for 6 months.
- Free logo watch: an email when someone later files a logo like yours.
How to check if a logo is trademarked
- Upload the logo above. A PNG, JPG, GIF or WebP file works, including a photo or a screenshot: we trim the background before comparing, so a rough copy still finds the original.
- Read the closest matches first. Each match shows its similarity score, status (live, pending or dead), owner and classes. A live or pending mark that looks alike and covers the same kind of goods or services is the one that matters. A dead mark no longer blocks you.
- Check the words too. Most logos are refused because of the name in them, not the picture. Run the name through the trademark availability check, which covers the name and logo together.
- Look beyond the registers. A business can own a logo it never registered, just by using it. Search the web and the marketplaces you sell on for the same logo or name before you commit to it.
You can also search by hand in the USPTO's own Trademark Search, using design codes: the USPTO describes every picture in a mark with codes such as "lions" or "stars". It is free and complete for the U.S. register, but you have to guess the right codes and look through the results one by one, and it does not cover the international register. The checker above does the comparison for you.
How this works
Your upload is compared against two registers at once: every U.S. trademark logo the USPTO publishes (3.8 million) and every international registration in WIPO's Madrid System that ships a logo image (275,753 and counting), using three independent engines, then merged into one ranking:
- Perceptual hash (pHash): a 64-bit fingerprint of the image's structure (light/dark regions, edges, composition) that ignores size, colour, compression and aspect ratio. Ranked by Hamming distance: lower = more visually similar.
- CLIP embedding: a neural "what does this depict" vector, so a differently drawn version of the same idea (another lion, another swoosh) still surfaces.
- Wording (OCR): we read the text inside your logo and match it against each mark's registered wording on both registers, which is how a restyled wordmark is caught when the graphics no longer look alike.
A mark that scores on two engines outranks one that scores on one. International hits are labelled as such and open the WIPO record; they matter because roughly half of Madrid registrations designate the United States, so a conflict that isn't in the USPTO's own logo files yet can still be waiting in the international register.
What "similar" means here
- Distance 0–4 (≥95% similar): essentially the same logo. Either you're looking at a copy, or the original applicant filed multiple variants.
- Distance 5–10 (~85–92% similar): same shape and composition, minor differences. This is what a §2(d) examining attorney would notice.
- Distance 11–18 (~72–84% similar): related visual style, different specifics. Might still be flagged if the marks cover related goods/services.
- Distance >22: not visually similar enough to be a likely conflict.
What this catches that text search doesn't
Most "trademark search" tools only compare names. A logo that's visually identical to an existing one but uses different text won't appear in a name search at all, yet it could still be refused under §2(d). This tool finds those visual-only collisions.
Limitations
- Color isn't decisive. pHash compares grayscale structure. Two logos with the same shape but different brand colors will match, which is usually correct (USPTO doesn't refuse just because colors differ).
- Stylized text logos: if your logo is mostly typography, the comparison is mostly to other typography-driven marks. The visual fingerprint is real but less informative than for graphic logos.
- Most of the corpus, not all of it. We index logos that USPTO publishes as image files and the images WIPO ships with the Madrid daily feed: every international registration with activity since mid-2025, growing daily; a dormant older registration that has not been touched since then may be missing. Word-only marks aren't included on either register. Use the risk assessment for those.
- Not legal advice. Use the results as a first-pass filter to flag the marks an attorney should look at more closely. Final clearance is always counsel's call.
Questions
How do I check if a logo is already trademarked?
Upload the logo above. It is compared against 3.8 million registered logos on the U.S. register and the international (Madrid) register, and the closest registered marks are listed with a similarity score and a link to each record. It is free and needs no account.
How do I find logos similar to mine?
Upload yours and the tool ranks registered logos by how alike they are, three ways: the shape and layout of the image, what it depicts (another lion, another swoosh), and the wording inside it. A different drawing of the same idea still shows up, which a name search never finds.
Can I search trademarks by image?
Yes, that is what this tool does. The USPTO's own search finds marks by their text and design codes, not by the picture. Here you upload the image itself and it works like a reverse image search over registered trademark logos, returning the closest ones with their owner, status and classes.
Is this similar logo checker free?
Yes. Every search is free, needs no signup, and the result stays at its own link for six months so you can share it or come back to it.
What similarity score is a problem?
Around 85% and above means the same shape and composition, which is what an examiner would notice. Lower scores can still matter when the goods or services are related. The USPTO judges the overall impression of both marks and whether buyers would be confused, so treat high matches as a reason to look closer, not as a verdict.
Can I check a logo that has no words in it?
Yes. The image itself is compared, so a pure symbol or icon is matched on its shape and on what it depicts. Words inside a logo are read and matched too.
Can I filter the results by class, status or date?
Yes. Choose what you will use the logo for and only the matches that could matter are shown: active marks in the same or a related Nice class, each with a one-line reason. You can also show active marks only, or only those filed in the last 2 or 5 years. The filters work instantly on the results page.
Is this a logo copyright checker?
Not quite, and for a brand logo the trademark question is usually the one that matters. Copyright protects a drawing from being copied; there is no searchable register of copyrighted pictures, and the U.S. Copyright Office records are searched by text such as title and author, not by image. To see whether your logo copies an image already online, use a reverse image search such as Google Lens or TinEye. To see whether it is too close to a brand someone else owns, which is what gets a filing refused or a seller reported, use the trademark check on this page.
Can I use a logo if no one has registered it?
Not always. In the U.S. a business gets rights in a logo just by using it in trade, without registering it, and can stop a later look-alike in the area where it trades. Those unregistered logos are not in any register, so also search the web and the marketplaces you sell on. A clean result here plus no sign of the logo in use is a good start, not a guarantee.
Does changing the colours or the font make a logo safe?
Usually not. The USPTO compares the overall impression of two marks, and a logo with the same shape or the same words in a new colour or typeface often still counts as confusingly similar. This checker compares shape regardless of colour for that reason.
Can I get an alert if someone files a similar logo later?
Yes. Set up a free logo watch and we compare every new U.S. and international filing against your logo daily, with at most one summary email a week.
Once you've found similar logos, run the matching mark names through the risk assessment tool to see how the trademark office has historically treated that name pattern. Already using this logo? Set up a free logo watch and we'll email you when a new filing looks too close.