Developer tools
Hashes, formatters, inspect jobs, lists, local AES, and text tools. Encoding and units live under converters.
49 tools
Categories
Hash, format, inspect, lists, and text
Crypto
Format
- CSS Formatter CSS Formatter in this browser.
- CSS Minifier CSS Minifier in this browser.
- CSV to JSON CSV to JSON in this browser.
- HTML Formatter HTML Formatter in this browser.
- HTML Minifier HTML Minifier in this browser.
- JSON Formatter Pretty-print JSON. Choose spaces or tabs, indent width, and whether to repair common mistakes.
- JSON Minifier Parse JSON and emit a compact single-line document. Invalid JSON is rejected unless repair is on.
- JSON to CSV JSON to CSV in this browser.
- JSON to YAML JSON to YAML in this browser.
- Markdown Preview Markdown Preview in this browser.
- SQL Formatter SQL Formatter in this browser.
- XML Formatter XML Formatter in this browser.
- YAML to JSON YAML to JSON in this browser.
Hash
- CRC-32 Checksum CRC32 computed in this browser. A digest is not encryption and cannot be reversed here.
- File Checksum Hash a local file of 32 MB or less. Nothing is uploaded.
- MD5 Hash Generator 128-bit MD5 digest of the input bytes. Prefer SHA-256 for new integrity work; keep MD5 to match a published legacy checksum.
- SHA-1 Hash Generator 160-bit SHA-1 digest of the input bytes. Keep it for Git objects and legacy checksums. Use SHA-256 for new integrity work.
- SHA-256 Hash Generator 256-bit SHA-256 digest of the input bytes. This is the default integrity hash on CZNull.
- SHA-384 Hash Generator SHA-384 computed in this browser. A digest is not encryption and cannot be reversed here.
- SHA-512 Hash Generator SHA-512 computed in this browser. A digest is not encryption and cannot be reversed here.
Inspect
- Cookie String Parser Parse a Cookie header. Not an editor for other sites.
- Cron Parser Describe a 5-field cron expression and list the next local runs.
- Text Diff Line-level diff. Minus is only in A. Plus is only in B.
- Epoch Milliseconds Unix milliseconds helper (Date.now style).
- JWT Decoder Decode JWT header and payload. No signature verification and no JWKS fetch.
- MIME Type Lookup MIME type from a static extension table. Unknown becomes application/octet-stream.
- Query String Parser Parse or build application/x-www-form-urlencoded query strings.
- Regex Tester Test a JavaScript regular expression and list matches.
- Unix Timestamp Converter Paste Unix seconds, milliseconds, or an ISO-8601 string. Auto treats up to 10-digit numbers as seconds and 13-digit numbers as milliseconds.
- URL Parser Split a URL with the URL constructor.
Lists
- Compare Lists See lines only in A, only in B, or in both. Optional ignore case.
- List Difference Lines in list A that do not appear in list B. Optional ignore case.
- Number Lines Add a running number to each line. Choose start, padding, and format.
- Reverse List Reverse the order of lines, or reverse the characters on each line.
- Shuffle List Shuffle lines with Web Crypto Fisher-Yates. Not Math.random.
- Sort List Sort lines A to Z or Z to A. Optional numeric sort and ignore case. Nothing uploaded.
- Remove Duplicate Lines Keep the first copy of each line and drop later duplicates. Optional ignore case.
Network
Text
- Find and Replace find replace in this browser.
- Add Prefix or Suffix prefix suffix in this browser.
- Remove Line Breaks remove line breaks in this browser.
- Repeat Text repeat text in this browser.
- Strip HTML Tags strip html in this browser.
- Tabs to Spaces tabs spaces in this browser.
- Word Counter Words are whitespace-separated tokens. UTF-8 bytes use TextEncoder in this browser.
- Word Wrap wrap text in this browser.