Batch GPS Stamp Tool
Upload multiple photos, automatically extract their embedded EXIF GPS and date data, then apply professional location overlay stamps -- all processed privately in your browser. No uploads to any server.
⚙️Overlay Settings
Drag & drop photos here
or click to browse -- JPEG, PNG, WebP supported
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Upload photos with embedded GPS data to get started
How It Works
Upload Photos
Drag and drop or browse for multiple JPEG, PNG, or WebP images at once.
EXIF Auto-Extract
GPS coordinates, date, altitude, and camera info are read from each photo's metadata.
Address Lookup
Coordinates are reverse-geocoded to human-readable addresses via OpenStreetMap.
Download Stamped
Each photo gets a professional overlay stamp. Download individually or all at once.
Understanding Batch GPS Stamping
Why Process Photos in Batches?
Field professionals frequently capture dozens or hundreds of photos during a single site visit, property inspection, or delivery route. Processing each photo individually with a GPS stamp would take hours of repetitive work. Batch processing eliminates this bottleneck by automatically extracting EXIF GPS data from every photo and applying a consistent location overlay to all images at once. A construction foreman who captures 50 photos during a morning walkthrough can have all of them stamped with verified GPS data in minutes rather than spending the rest of the day on manual processing.
How EXIF GPS Extraction Works
Every photo taken with a GPS-enabled smartphone stores location data in a standardized format called EXIF (Exchangeable Image File Format). This metadata is embedded in the image file itself and includes GPS coordinates (latitude and longitude), altitude above sea level, the capture timestamp, camera make and model, and various technical settings. When you upload photos to the batch stamp tool, it reads the EXIF data from each file using the exifr JavaScript library, which parses the binary EXIF tags directly in your browser. If GPS data is found, the coordinates are extracted and used to generate the visible stamp. Photos without GPS data are flagged so you can enter coordinates manually.
Address Resolution via Reverse Geocoding
Raw GPS coordinates are precise but not immediately meaningful to most viewers. The batch tool automatically converts each photo's GPS coordinates into a human-readable street address using OpenStreetMap's Nominatim reverse geocoding API. This process sends only the latitude and longitude values to the geocoding service, never the photo itself. The returned address is then included on the GPS stamp alongside the raw coordinates. To respect Nominatim's usage policy, address lookups are spaced with small delays between requests when processing large batches, ensuring reliable results without overloading the service.
Consistent Overlay Templates for Professional Output
Batch processing ensures every photo in a set receives an identical stamp format, creating professional, consistent documentation. You configure the stamp settings once, choosing font size, overlay position (top or bottom), and which data fields to display (timestamp, coordinates, altitude, address). These settings are applied uniformly across all photos in the batch. This consistency is particularly important for formal documentation such as construction progress reports, insurance claim submissions, and property inspection records, where a uniform presentation reinforces the credibility and professionalism of the entire photo set.
Client-Side Processing: No Server Uploads
The entire batch stamping process runs in your web browser using JavaScript and the HTML Canvas API. Each photo is loaded into memory, the EXIF data is parsed, the GPS overlay is rendered on a canvas element, and the final stamped image is exported as a high-quality JPEG, all without sending your photos to any external server. This architecture means your images never leave your device, which is critical for photos containing sensitive information such as private property interiors, construction site conditions, accident scenes, or any images subject to legal discovery or privacy regulations.
Professional Use Cases for Batch Stamping
Construction Daily Reports
Site supervisors capture 30-100 photos per day documenting progress, safety conditions, and material deliveries. Batch stamping adds GPS verification to every image, creating a comprehensive daily log that proves each photo was taken at the correct job site on the correct date.
Property Inspection Portfolios
Property managers photographing multiple units during move-in or move-out inspections need every image tied to the correct address. Batch stamping automatically differentiates photos by location, preventing the costly error of attributing damage photos to the wrong property.
Insurance Claim Documentation
After storms, accidents, or other covered events, adjusters document damage across multiple properties in a single day. Batch processing ensures every claim photo includes verified location data that matches the policy address, streamlining review and reducing fraud exposure.
Delivery Route Verification
Delivery drivers accumulate proof-of-delivery photos throughout their routes. At the end of the day, batch stamping adds GPS verification to all photos at once, creating a complete, location-verified delivery record for dispute resolution and compliance documentation.
Frequently Asked Questions
What is EXIF GPS data?
EXIF (Exchangeable Image File Format) is metadata embedded in photos by your camera or phone. When location services are enabled, the GPS coordinates, altitude, date, and camera model are stored in the image file. This tool reads that data and uses it to create a visible stamp.
Are my photos uploaded to a server?
No. All processing happens entirely in your web browser using JavaScript and the HTML5 Canvas API. Your photos never leave your device. We do not store, transmit, or have access to any of your images.
What if my photo does not have GPS data?
If a photo lacks embedded GPS coordinates, the tool will flag it and give you the option to manually enter latitude and longitude values. The stamp will then be applied with the coordinates you provide.
Which image formats are supported?
The batch stamp tool supports JPEG, PNG, and WebP images. JPEG files are most likely to contain EXIF GPS data since it is the standard format for camera and smartphone photos.
How does the address lookup work?
The tool uses the OpenStreetMap Nominatim API to convert GPS coordinates into a human-readable address (reverse geocoding). This is the same service used by many open-source mapping applications. There is a small delay between requests to respect their usage policy.
Can I customize what information appears on the stamp?
Yes. The settings panel lets you toggle each data field on or off: timestamp, GPS coordinates, altitude, address, and the GPSnap badge. You can also choose between small, medium, or large font sizes and whether the overlay appears at the top or bottom of the image.
Is there a limit on how many photos I can process?
There is no hard limit. However, since all processing happens in your browser, very large batches (hundreds of high-resolution images) may slow down depending on your device. We recommend processing in batches of 20-50 images for the best experience.
What is the output format and quality?
Stamped images are exported as JPEG files at 92% quality. The output resolution matches the original photo resolution, so you do not lose any detail.
Need to capture new photos with GPS overlays in real-time?
Try the Live Capture Tool