Developer Tools
Password Generator
Create strong, random passwords with adjustable length, symbols, and pronounceable options. 100% offline.
1991 users/month
Encode or decode entire URLs or just components (path, query, fragment) using RFC-3986 percent encoding. Inspect and edit query parameters in a friendly grid view, then export the rebuilt URL. Great for debugging redirects and API integrations.
DEV-TOP · horizontalDeveloper
Percent-encode or decode any string for safe use in URLs and query strings.
Input
Output
https%3A%2F%2Futilityapps.site%2F%3Fq%3Dhello%20world%26lang%3Den
DEV-MID · rectangleBuilt for everyday work
URL Encoder & Decoder runs entirely in your browser — files never leave your device.
No signup, no upload queue, no captcha. Use URL Encoder & Decoder and move on with your day.
Mobile, tablet, desktop, and offline (PWA). Install once, use everywhere.
No premium tier, no per-use fees. Optional ads keep the lights on; you keep the tool.
Getting started
URL Encoder & Decoder loads instantly on this page — no download or signup. Once it ships, it'll run entirely inside your browser.
Type, paste, or upload what you need. Percent-encode and decode URLs, query parameters, and components for safe links and API requests.
Use the result right away, copy it to your clipboard, or bookmark this page so you can come back without searching.
Developer Tools
How to test regex patterns the right way — build them incrementally, cover edge cases, avoid catastrophic backtracking, and debug with a live regex tester.
4 min · Jun 19, 2026
Developer Tools
Base64 encoding explained in plain English — what it is, why it makes data larger, and the real-world cases where developers actually use it.
4 min · Jun 9, 2026
Developer Tools
How to format and minify JSON — when to use each, common JSON errors and how to fix them, validation tips, and a free in-browser JSON formatter.
4 min · May 29, 2026
Every other developer tool — jump straight in.
Developer Tools
Create strong, random passwords with adjustable length, symbols, and pronounceable options. 100% offline.
Developer Tools
Format, validate, minify, and convert JSON with syntax error highlighting and JSONPath query support.
Developer Tools
Encode and decode Base64 strings, files, and images instantly with URL-safe and standard variants.
Developer Tools
Decode JWT tokens free in your browser. See header, payload, and signature, plus verify HS256/HS384/HS512 signatures with a shared secret.
Developer Tools
Generate v1, v4, or v7 UUIDs free in your browser. Single or batches up to 1,000. Copy or download as .txt.
Developer Tools
Test JavaScript regex patterns live in your browser. Live match highlighting, named + numbered capture groups, all standard flags.
Developer Tools
Convert YAML to JSON or JSON to YAML free in your browser. Live preview, YAML 1.2 support, anchors and aliases handled.
Developer Tools
Convert CSV to JSON free in your browser. Auto-detects separators (comma, semicolon, tab, pipe), handles quoted values, header toggle.
Developer Tools
Build cron expressions visually, see plain-English description, and preview the next 5 fire times in your local timezone.
Developer Tools
Pretty-print or minify HTML free in your browser. Embedded JS and CSS are formatted too. Configurable indent.
Developer Tools
Format SQL queries free in your browser. Postgres, MySQL, BigQuery, Snowflake, Redshift, SQLite, T-SQL and more. Configurable indent and keyword case.
Developer Tools
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of text or files free in your browser. WebCrypto-backed.
Developer Tools
Convert between HEX, RGB, HSL, and the 147 named CSS colours. Live preview swatch and one-click copy.
DEV-BOTTOM · horizontalFrequently asked
More from UtilityApps