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Free Online Encoding & Developer Tools

Base64, JSON formatter, regex tester, code minifiers, timestamps, and UUIDs. Process files 100% locally in your browser with no uploads or registration required.

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Base64 Encoder / Decoder
Encode text or binary data to Base64 and decode Base64 back to text.
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FREE
URL Encoder / Decoder
Percent-encode strings for URLs or decode encoded parameters.
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JSON Formatter & Validator
Format, beautify, minify, and validate JSON strings.
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FREE
XML Formatter & Validator
Beautify and format XML code with proper indentation.
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FREE
HTML Minifier & Beautifier
Compress HTML code or reformat it with clean indentation.
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FREE
CSS Minifier & Beautifier
Minify CSS stylesheets or beautify minified styles.
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FREE
JS Minifier & Beautifier
Minify JavaScript code or format unreadable JS scripts.
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NEW
Regex Tester & Debugger
Test regular expressions with real-time string match highlighting.
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FREE
Markdown Editor & Previewer
Write Markdown with instant HTML live preview.
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FREE
Markdown ⇄ HTML Converter
Convert Markdown text to HTML markup or HTML to Markdown.
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FREE
UUID / GUID Generator
Generate random v4 UUIDs using browser cryptography.
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FREE
Hash Generator (MD5/SHA)
Compute MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes.
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File Hash Checker
Calculate cryptographic SHA-256 checksums of local files.
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FREE
HTML Entity Encoder / Decoder
Encode special characters into HTML entities and decode back.
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FREE
Emoji to HTML Entity Converter
Convert Unicode emojis to decimal and hex HTML entities.
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FREE
JWT Decoder
Decode JSON Web Token payload and header instantly.
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FREE
Unix Timestamp Converter
Convert Unix epoch timestamps to human dates and vice versa.
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NEW
Cron Expression Generator
Build and explain 5-part cron schedule expressions.
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FREE
URL Parser & Query Extractor
Parse URLs into protocol, host, pathname, hash, and query params.
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NEW
Chrome Extension Icon Set Generator
Generate 16px, 32px, 48px, 128px PNG icon packs for extensions.
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About Encoding & Developer Tools on Toolhammer

Discover our full suite of 20 Encoding & Developer Tools. Every tool in this category is engineered to run client-side using native browser technologies. That means your data, files, and text entries process at maximum speed without compromising privacy.

Select any tool above to get started immediately — no registration, subscriptions, or downloads required.