v1.056+ free developer tools · privacy-firstAll the developer tools
All the developer tools
you need, in one place.
Format JSON, decode JWT, parse cron, convert to Go structs. Everything runs in your browser — no signup, no ads, no data leaving your machine.
56+
tools shipped
~50ms
avg. processing
100%
client-side
$0
forever free
// Browse by category
All categories 8 categories, 56+ tools
From everyday utilities to Go-specific helpers and data format converters.
JSON Tools
Format, validate, convert, and manipulate JSON data
4 tools
Encoding & Decoding
Encode and decode Base64, URL, HTML, and other formats
5 tools
Hashing & Crypto
Generate hashes, encrypt data, and manage cryptographic keys
7 tools
JWT & Auth
Decode JWTs, generate UUIDs, and work with authentication tokens
5 tools
Text & String
Convert case, generate slugs, lorem ipsum, and manipulate text
4 tools
Date & Time
Convert timestamps, parse cron expressions, and work with dates
4 tools
Regex Tools
Test, debug, and generate regular expressions
1 tool
Go-Specific
Convert JSON to Go structs, build struct tags, and Go utilities
6 tools
// Most used this week
View all Popular tools
What other engineers reach for first.
JSON Formatter & Validator
Format, beautify, and validate JSON instantly in your browser.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) locally in your browser.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings instantly in your browser.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.
UUID Generator
Generate v1, v4, and v7 UUIDs in bulk — instantly in your browser.
Cron Expression Parser
Parse cron expressions and see the next scheduled run times.
Regex Tester
Test regular expressions against strings with match highlighting and group extraction.
Text Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, and 4 more.
// What makes us different
Built for engineers who care
Privacy-first
100% client-side processing for non-AI tools. Your data never leaves your browser.
Lightning fast
Sub-second loads, instant results. Built on edge infrastructure with aggressive caching.
No ads, no signup
Just tools. No interstitials, no email walls, no tracking pixels.
Built by Gophers
Idiomatic Go-specific helpers you won't find on generic toolboxes.
// Our differentiator
Explore Go tools Go-specific tools, done right
Built by Go engineers — not generic JSON-to-anything converters.
JSON to Go Struct
Convert JSON to Go struct definitions with optional struct tags.
Go Struct Tag Builder
Build Go structs from JSON with auto-generated json, db, validate, and yaml tags.
Go Error Wrapping Helper
Generate idiomatic Go error patterns: fmt.Errorf %w, errors.New, sentinel errors, custom types.
Go Module Path Validator
Validate Go module paths (go.mod) against Go's naming rules with warnings and hints.
Go Time Format Converter
Convert strftime, Java, Python time formats to Go's peculiar reference layout (2006-01-02).
SQL → Go Struct
Convert a CREATE TABLE statement into an idiomatic Go struct with json/db/validate tags.
// From the blog
Read the blog Learn Go on santekno.com
Tutorials, deep-dives, and real-world patterns from production codebases.
Tutorial · 12 min
Implementasi JWT di Golang dengan refresh token
From signing to revocation — a production-ready auth flow with Echo & jwt-go.
Tutorial · 8 min
Cron jobs di Go: dari time.Ticker sampai gocron
Schedule background tasks reliably with graceful shutdown.
Deep dive · 18 min
JSON unmarshaling pitfalls dan cara menghindarinya
Untyped maps, custom Unmarshalers, numbers as strings, and time.Time hell.