Developer Tools

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JSON Formatter

Format, validate and minify JSON instantly — 100% in your browser.

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Base64 Encoder / Decoder

Encode and decode Base64 text, files and images — safely, in your browser.

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Timestamp Converter

Convert Unix epoch timestamps to dates and back — seconds and milliseconds.

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Discord Timestamp Generator

Create Discord timestamps that show in every user's own timezone.

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URL Encoder / Decoder

URL-encode text and decode percent-encoded URLs — plus HTML entities.

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UUID Generator

Generate random UUIDs (version 4) in bulk — up to 100 at once.

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Hash Generator

Calculate MD5, SHA-1, SHA-256, SHA-512 and CRC32 hashes of any text.

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File Checksum Calculator

Verify downloads: MD5, SHA-1, SHA-256 and SHA-512 checksums of any file.

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File Compressor

Compress files into a ZIP archive in your browser — nothing uploaded.

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JWT Decoder

Decode JWT header and payload, check expiry — without sending the token anywhere.

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SQL Formatter

Format and beautify SQL queries — or minify them — instantly.

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Regex Tester

Test regular expressions live — matches, groups and highlighting.

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JSON to CSV Converter

Convert JSON arrays to CSV spreadsheets — download in one click.

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JSON to Excel Converter

Convert JSON to a real .xlsx Excel file, ready to open.

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JSON to XML Converter

Convert JSON to XML with proper escaping and array handling.

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CSV to JSON Converter

Convert CSV spreadsheets to JSON arrays of objects.

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JSON to YAML Converter

Convert JSON to clean, readable YAML for configs.

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JSON Escape / Unescape

Escape text for embedding in JSON strings, and unescape JSON strings.

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CSS Grid Generator

Design a CSS grid visually — tracks, gaps, alignment — and copy the code.

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Online Code Checker

Check HTML, CSS or JavaScript for common errors — in your browser.

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Website Source Code Viewer

Fetch and view any web page's HTML source — size and line count included.