Free stamp tools
Free tools for stamp collectors
All tools
- You think you have a famous classicStamp Value CheckerPick a famous stamp and a condition to see the indicative value range from our guides, with rarity and era. Not an appraisal.Open the tool
- Two stamps look the same but list differentlyStamp Perforation GaugeMeasure perforations from perf 10 to 16 on a screen you calibrate with a credit card, or print a true-size gauge.Open the tool
- You inherited an album or a boxStamp Collection Value EstimatorAnswer a few questions about an album or box and get a rough, clearly labeled value tier plus what to do next.Open the tool
- You want to describe centering the way dealers doStamp Centering GraderEnter the four margins and see how the centering compares with PSE's published standards on the 100-point scale.Open the tool
- The catalog splits an issue by watermarkStamp Watermark FinderChoose a detection method, follow the steps, and compare what you see with a reference library of common watermarks.Open the tool
How we build these
Sourced numbers, honest limits
Every threshold in these tools comes from a published source, listed at the bottom of each page. Stamp values come only from our own value guides; other figures, such as dealer buying rates, come from the dealers and societies we cite. Where we could not find a solid number, the tool says so and gives a tier instead of a dollar figure.
None of the tools is an appraisal. They help you sort, measure and decide what to show an expert.
Questions about the tools
Are these stamp tools free?
Yes. All five tools run in your browser at no cost and need no account. The StampSnap iPhone app is separate: your first 3 scans are free, and a premium subscription is needed for full features.
Do these tools give me an appraisal?
No. The value tools show indicative ranges and rough tiers to help you decide what deserves a closer look. Only a qualified appraiser, auction house or expertizing service can give an appraisal or a certified grade.
Which tool should I start with?
If you have one stamp, identify it first, then check its value, perforation and watermark. If you have a whole album, start with the collection value estimator. It will tell you which stamps to look at first.