Formatters & Minifiers
24 free formatters & minifiers tools in the Developer Tools collection — every one runs in your browser with no signup and no uploads.
C/C++ printf Format Specifiers
All printf/scanf format specifiers with type, width, precision and length modifiers.
Coordinate Format Converter
Convert between decimal degrees, DMS, DDM, UTM, and Geohash
RSS / Atom Feed Formats Reference
RSS 2.0 and Atom 1.0 required and optional elements with namespace context.
IEEE 754 Floating-Point Reference
IEEE 754 half, single, double and extended formats with bit-field layout.
IMO Number Format Reference
How IMO ship identification numbers are structured and verified
International Date Format Reference
Date format conventions by country: DMY, MDY, or YMD
ISO 8601 Date/Time Format Reference
ISO 8601 date, time, interval and duration formats with component definitions.
JavaScript Formatter / Beautifier
Format minified or messy JavaScript with clean indentation in the browser
JavaScript Minifier
Minify JavaScript by stripping comments and whitespace — no upload
Nginx Config Formatter
Format and validate Nginx configuration files in your browser
OpenMetrics Exposition Format
OpenMetrics text format keywords, type lines and label syntax reference.
PEM Private Key Format Validator
Paste a PEM key to verify its type and structure without transmitting it
Python datetime Format Codes
All strftime/strptime format codes with example output and locale notes.
Python Format String Reference
Decode any Python format spec and look up every fill, align, sign and type code
strftime Format Reference
All strftime format codes across C, Python, Ruby, PHP, shell with examples.
SWIFT/BIC Format by Country
Understand the SWIFT/BIC code structure for any country's banks
Terraform HCL Formatter
Format Terraform .tf HCL files with canonical indentation in your browser
Coordinate Formatter (Multi-format)
Display one coordinate in DD, DMS, DDM, UTM, and MGRS simultaneously
WebAuthn Attestation Format Reference
WebAuthn attestation statement formats — packed, tpm, apple, android — with trust model.
India GSTIN Validator
Validate a 15-character GSTIN — state code, PAN and base-36 check digit.
HTML Formatter & Minifier
Pretty-print or minify HTML in your browser — nothing is uploaded.
JavaScript Minifier
Strip comments and whitespace to shrink your JS.
HTML Minifier
Shrink HTML by removing comments and collapsing whitespace.
ISO 8601 Date Formatter
Format any date as a standards-compliant ISO 8601 string.