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.
JSON Tools
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) locally in your browser.
JWT & Auth
Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings instantly in your browser.
Encoding & Decoding
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.
Hashing & Crypto
UUID Generator
Generate v1, v4, and v7 UUIDs in bulk — instantly in your browser.
JWT & Auth
Cron Expression Parser
Parse cron expressions and see the next scheduled run times.
Date & Time
Regex Tester
Test regular expressions against strings with match highlighting and group extraction.
Regex Tools
Text Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, and 4 more.
Text & String
// 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-Specific
Go Struct Tag Builder
Build Go structs from JSON with auto-generated json, db, validate, and yaml tags.
Go-Specific
Go Error Wrapping Helper
Generate idiomatic Go error patterns: fmt.Errorf %w, errors.New, sentinel errors, custom types.
Go-Specific
Go Module Path Validator
Validate Go module paths (go.mod) against Go's naming rules with warnings and hints.
Go-Specific
Go Time Format Converter
Convert strftime, Java, Python time formats to Go's peculiar reference layout (2006-01-02).
Go-Specific
SQL → Go Struct
Convert a CREATE TABLE statement into an idiomatic Go struct with json/db/validate tags.
Go-Specific
// 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.