Free to use
Free tools for everyday work.
Simple, useful tools that help you get things done.
おやこで楽しくあそんでまなぶ キッズシリーズ
Categories
Popular tools
- Developer
JSON Formatter
Format, minify, and validate JSON.
Open tool - Developer
Timestamp Converter
Convert Unix timestamps and dates.
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UUID Generator
Generate RFC 4122 UUID v4 values.
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Base64 Converter
Encode and decode Base64 in your browser.
Open tool - Text
Word Counter
Count characters, words, sentences, and paragraphs live.
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Hash Generator
Generate SHA digests in your browser.
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Password Generator
Generate strong random passwords in your browser.
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URL Encoder
Percent-encode or decode URLs and query values in your browser. Pasted text stays on this device — nothing is uploaded.
Open tool - Developer
Color Converter
Convert HEX, RGB, and HSL colors in your browser.
Open tool - Developer
JWT Decoder
Decode JWT header and payload in your browser.
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Case Converter
Convert camelCase, snake_case, kebab-case, and more in your browser.
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Chmod Calculator
Convert Unix file permissions with checkboxes, octal, and symbolic notation.
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Number Base Converter
Convert binary, octal, decimal, hex, and custom bases 2–36 with BigInt precision.
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HTML Entity Encoder
Encode or decode HTML entities (named, decimal, hex) in your browser. Pasted text stays on this device — nothing is uploaded.
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CSS Unit Converter
Convert px, rem, em, %, vw, vh, and more CSS length units in your browser. Values stay on this device — nothing is uploaded.
Open tool - Text
Line Sorter
Sort text lines A–Z or by length, remove duplicates and blank lines in your browser. Pasted text stays on this device — nothing is uploaded.
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Why Nolasu
Free
Core features are free to use.
No signup
Start immediately. No account required.
Browser-based
Processing runs in your browser on this device.
No install
Open the page and work. Nothing to install.