Handy Tools for Developers
Dev Toolbox is a collection of browser-based tools for everyday development.
Math Tools
Online LaTeX Equation Converter
Type LaTeX expressions and preview equations in real time. Over 100 symbols available for one-click input. Download as PNG, SVG, or MathML.
Binary Converter - Decimal, Hex & Octal
Enter a number and click Convert to instantly convert between different number bases. Supports 0b and 0x notation. Useful for programming and computer science studies.
Text Tools
JSON Formatter & Validator
Paste a JSON string and click Format to get a nicely indented and highlighted output. Use Minify to compress, or Sort Keys to alphabetize object keys. Includes validation, detailed error messages, and syntax highlighting — ideal for API development and debugging.
JSON Diff - Compare & Visualize Differences
Enter two JSON objects and click Compare to see the differences highlighted. Useful for comparing API responses and verifying configuration changes.
URL Encoder & Decoder
Enter text and press the Encode or Decode button to convert. Supports Japanese and special character encoding.
XML Formatter - Pretty Print XML
Format compressed XML and SVG in your browser. Indent with two spaces, four spaces or a tab, or minify it back down to a single line. Syntax highlighting makes structure easy to read at a glance. Ideal for debugging API responses and data integrations.
Character Counter & Word Counter
Type or paste text to instantly see character count, line count, paragraph count, and more. Toggle between including or excluding spaces. Useful for reports, social media posts, and SEO meta tag checks.
Security Tools
SHA Hash Generator (SHA1/SHA256/SHA512)
Supports SHA1, SHA256, SHA384, SHA512, and HMAC generation. All hash generation is performed in your browser — your data is never sent to a server or stored anywhere.
File Type Detector - Dr.Filescan
Drop files to detect their types. Powered by Google's Magika AI. All processing happens in your browser — files are never uploaded anywhere.
Network Tools
GIS & Geography Tools
GeoJSON Viewer & Validator
Draws GeoJSON on a map and validates it against RFC 7946. It checks ring closure, winding order and coordinate ranges, and whether a declared bbox still matches the data. Everything runs in your browser.
Geocode Viewer - Quadkey, Geohash & Plus Code
Enter latitude and longitude to convert to various geocode formats and visualize grids on the map. Supports Plus Codes, Quadkey, Geohash, and Japan Grid Square codes. Useful for GIS development and location verification.
WKT to GeoJSON Converter
Enter WKT or GeoJSON to convert between formats and view the result on an interactive map. Supports FeatureCollection to GEOMETRYCOLLECTION conversion. Useful for inspecting geospatial data from PostGIS, SQL Server, and similar systems.
Shapefile Viewer & GeoJSON Converter
Draws a shapefile on a map and converts it to GeoJSON (WGS84). When the ZIP has no .prj, it asks which datum to read the coordinates in before drawing and converting them. Everything runs in your browser.