Developer tools
Hashes, formatters, inspect jobs, lists, local AES, and text tools. Encoding and units live under converters.
51 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.
- Filter Lines Keep lines that contain the query, or invert to drop matches. Optional ignore case and regular expressions. This is not unique-lines and not find-replace.
- 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.
- Remove Extra Spaces Collapse squeezes internal spaces and tabs after trimming each line. Trim only strips line edges. All deletes spaces and tabs and keeps newlines. Nothing is sent to CZNull.
- 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.