What coordinate systems are supported?

WGS84, Web Mercator (EPSG:3857), UTM, and a large EPSG catalog via proj4. GCJ-02 and BD-09 are available as optional regional systems.

Which vector formats can I convert?

Shapefile, GeoJSON, GeoPackage, CSV, KML, GPX, WKT, TopoJSON, and DXF (via browser WASM where needed). Pair pages and the Format Converter cover common routes.

What are the file size limits?

About 100 MB per file for most single-file tools. Batch Convert allows 100 MB total for all files in one run.

Why did conversion or analysis fail?

Common causes: wrong or corrupt file, unsupported geometry for the operator, projected CSV without lon/lat, or a layer that is too large for the browser. Read the error toast—silent pass-through is not used for failed CRS transforms.

Sixteen browser tools for AI agents (Chrome 146+ with the WebMCP flag). They call the same local GIS path as the UI—no server upload for processing.

Pro is a local stub today (license key in this browser). Copy and limits describe that honestly; there is no remote license server yet.

Where should I start?

New files: File Inspector. Operator + format: Tool Matrix. Multi-step vector: Workflow. Rasters: GeoTIFF Tools. One-off convert: Format Converter or Batch Convert.

Documentation

Help Documentation

GIS Toolbox is a browser-only GIS workbench. Files stay on your device; processing runs in JavaScript and WebAssembly. Start with Inspect or the Tool Matrix, or open a dedicated tool below.

Tools

100MB

Per-file cap

Server uploads

Start here

Choose a path

Four entry points cover most work. Pick one, then open the matching tool.

Inspect a file

Schema, bbox, measures, attribute table, and map preview before you convert or analyze.

Run an operator

Tool Matrix pairs an operation with an input format, then exports in a preset format.

Chain vector steps

Build a local recipe, reuse templates, and share with a #wf= URL hash.

Work with rasters

GeoTIFF inspect, crop, reproject, bands, and chainable #rwf= raster workflows.

Workflow

Quick start

Fourteen tools run end-to-end in the browser. Pick a path below, add local data, run the tool, then download the result.

1
Open Tools for the hub, or jump to a tool in the catalog below.
2
Upload or paste data locally. GIS processing is not uploaded to a server.
3
Prefer WGS84 / EPSG / UTM unless you need an optional regional CRS.
4
Run the tool (or chain steps in Workflow / Raster Workflow), then download.

Catalog

Tool catalog

Fourteen first-class tools. Each page runs end-to-end in the browser.

Open Tools hub →

Convert

Coordinate System

Convert between WGS84, Web Mercator, UTM, and 100+ EPSG coordinate systems

Format Conversion

Support conversions between GIS formats like Shapefile, GeoJSON, CSV and more

Batch Converter

Convert a ZIP or many GIS files to one format at once

Analyze & measure

Spatial Analysis

Buffer, intersect, union, difference, and dissolve GeoJSON polygons

Tool Matrix

Browse GIS operations by task and file format

Measurement Tools

Measure distances and areas on map with great-circle distance calculation

3D Measurement Tools

Measure distances and areas on 3D globe with terrain and imagery switching

Generate & chain

Generators

Create grids, Voronoi, TIN, and random points

Workflow Builder

Chain GIS operations into a reusable local pipeline

GeoTIFF Tools

Inspect, crop, reproject, and extract bands from rasters

Inspect & prepare

File Inspector

Inspect attributes, geometry types, bbox, and schema

Map Explorer

Pick coordinates, switch basemaps/CRS, and search locations

Data Processing Tools

Merge and split GeoJSON data with batch processing support

Data Compression Tool

Compress GeoJSON and TopoJSON files to reduce file size and optimize performance

Guides

Start here for the most common workflows:

How-to

Batch GIS File Conversion Guide

Convert a ZIP or many files to one target format in the browser.

Integration

AI Agent Integration with WebMCP

Sixteen local tools for AI browser agents in Chrome 146+.

Regional CRS notes

Reference articles for regional datums you may encounter in some datasets:

Convert GCJ-02 online Convert BD-09 online How to Convert GCJ-02 to CGCS2000 (EPSG:4490) How to Convert WGS84 to GCJ-02

Constraints

Limits & privacy

Hard limits and privacy defaults. Read these before large batch runs.

Single-file tools

Most single-file tools accept about 100 MB per file (Inspector, format convert, spatial, data tools, GeoTIFF).

Batch Convert

Batch Convert enforces a 100 MB total across all selected files in one run.

Local processing

GIS files are not uploaded for processing. Work stays in your browser session.

Optional analytics

Optional analytics load only after you accept cookies. Decline keeps the product fully usable without them.

Workbench

Workbench tips

How the deeper surfaces fit together once you leave a one-shot converter.

File Inspector

Schema, bbox, measure totals, attribute table, and map preview for a local layer.

Tool Matrix

Pick an operator and input format, run in Tool Runner, then download in a preset export format.

Workflow

Chain vector steps locally. Share with #wf= in the URL. Templates and a local recipe library are included.

#wf=

GeoTIFF & raster workflow

Inspect, crop, reproject, and band tools, plus chainable #rwf= raster workflows.

#rwf=

Reference

CRS & formats

Defaults stay global-first. Regional datums and raster tools are available when you need them.

Coordinate conversion

Paste lon,lat (or lat,lon) points, or import CSV / Excel / JSON. Failed rows are reported; bad coordinates are not kept silently.

WGS84Standard GPS datum used worldwide
3857Web Mercator — the projected CRS used by most web maps
EPSGSearch 100+ EPSG definitions in the coordinate converter

GCJ-02 and BD-09 remain available in the engine for regional data. They are optional—defaults and SEO stay on WGS84 / EPSG / UTM.

Format conversion

Shapefile CSV GeoJSON TopoJSON KML GPX DXF (CAD) WKT GeoPackage FlatGeobuf GML MapInfo TAB File Geodatabase Excel (xlsx) GeoParquet PMTiles

All format conversion runs locally in your browser.

Single-file conversion accepts about 100 MB. For many files, use Batch Convert (100 MB total per run). Very large layers may be slow in the browser.

GeoTIFF and other raster workflows live under GeoTIFF Tools, not the vector Format Converter.

SuperMap UDB/UDBX is not supported. Export to GeoJSON or Shapefile first.

WebMCP

AI agent integration (WebMCP)

GIS Toolbox registers sixteen tools for AI browser agents via WebMCP. Agents call the same local GIS path as the UI—your files are not uploaded for processing.

Read the WebMCP guide

FAQ

Frequently asked questions

Short answers to the questions that usually block a first successful run.

No. Coordinate, format, spatial, generator, GeoTIFF, workflow, and batch tools process data locally. Optional analytics only load if you accept cookies.

Ready to process data?

Open the Tools hub and start with Inspect, Matrix, or Format Converter.

Go to Tools

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