3 free tools
Free Online Developer Tools
Small, precise utilities for everyday development work. Encode and decode Base64 for text and binary files, test regular expressions with live matches and capture groups, and generate MD5, SHA and CRC32 hashes to verify downloads.
Each tool runs locally in your browser, so API keys, tokens and files you paste are never uploaded. They also handle the edge cases many online tools get wrong: Base64 works on raw bytes, so files round-trip without corruption; the regex tester runs patterns in a background worker with a time limit, so a runaway pattern cannot freeze your tab; and large files are hashed in chunks instead of being loaded into memory at once.
Developer tools
3 tools- Base64 Encoder & DecoderEncode or decode Base64 online for text and any file, byte-accurate, with UTF-8, URL-safe (JWT) mode, data URIs and a hex view.
- Regex TesterTest regular expressions online with live matches, capture groups, a plain-English explainer, replace preview and code export.
- Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-512, SHA-3 and CRC32 hashes for text or files of any size, with HMAC and hash checking.
More tools developers use
- JSON Formatter & ValidatorFormat, validate and beautify JSON online with exact line and column errors, one-click fixes for trailing commas, a tree view, search and minify.
- Text to SlugTurn any title into a clean, SEO-friendly URL slug.
- Find and Replace TextFind and replace text online with regex capture groups ($1, $2), whole-word and case-preserving matches, a live highlighted preview and bulk rules.
- Password GeneratorGenerate strong, cryptographically random passwords and passphrases with every character type you pick, plus entropy and crack-time estimates.
- Text Case ConverterConvert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and 10+ more as you type.
- JSON to PDFConvert JSON to PDF as a syntax-highlighted printout, a tree view or a table.
Guides and tips
- What Is Base64 Encoding? How It Works, With Examples
Text & Developer Tools · 7 min read
- How to Fix Invalid JSON: Common Errors and Their Fixes
Text & Developer Tools · 9 min read
- How to Create a UPI QR Code for Payments (Free, With Amount)
Text & Developer Tools · 7 min read
- How to Count Words in a PDF (Accurately, Even Scanned Files)
Text & Developer Tools · 6 min read
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