๐ป Encoding / Dev
JSON / Base64 / URL / timestamp / hash / UUID / regex / base All 17 tools run 100% locally in your browser โ files are never uploaded, free to use.
JSON Formatter / Validator
Format, minify and validate JSON locally, with error line location.
Base64 Encode / Decode
Encode/decode text & images to Base64 locally, Chinese supported.
URL Encode / Decode
Percent-encode and decode URLs/text locally.
Timestamp Converter
Convert between timestamp (sec/ms) and date-time locally.
Hash Calculator
Compute MD5/SHA1/SHA256/SHA512 digests locally.
UUID Generator
Generate batch UUID v4 locally with crypto randomness.
Regex Tester
Test regex match/replace locally, highlight hits.
Base Converter
Convert between binary/octal/decimal/hex locally, big int.
RMB Uppercase
Convert numeric amounts to Chinese capital locally, copy-ready.
JWT Decoder
Decode the three JWT parts locally and pretty-print.
Cron Parser
Parse cron meaning and predict next runs locally.
CSV โ JSON Converter
Convert CSV and JSON both ways locally, multiple delimiters.
AES Text Encrypt / Decrypt
Encrypt/decrypt text locally with AES-GCM, passphrase stays local.
Morse Code Encode / Decode
Convert text and Morse code both ways locally, common characters supported.
URL Parser / Builder
Split a URL into parts and parse query params locally, then rebuild.
XML Formatter / Validator
Format and validate XML locally, indent & locate errors.
HTML Live Preview
Render HTML snippets live in a sandboxed iframe locally for debugging.
About Encoding / Dev
Encoding / Dev tools run entirely in your browser locally โ no upload needed, faster and more private. We keep adding more Encoding / Dev tools.
FAQ
Do these tools need to upload files?
No. All processing is done locally in your browser; files never leave your device.
Does it work on mobile?
Yes. The site is responsive and works on phones, tablets, and desktop browsers.