345 free online tools
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Flatten and restore JSON
Flatten nested JSON into reversible JSON Pointer paths, or restore a dot-key map as nested objects.
JSON Pointer extractor
Read one value using a precise RFC 6901 path.
Merge JSON objects
Apply an override object while retaining untouched nested keys.
JSON to typed XML
Convert JSON to XML with type attributes for objects, arrays and scalar values.
XML to JSON tree
Convert XML with mixed text and elements to an order-preserving JSON tree.
XML formatter
Indent XML structure while keeping mixed text, CDATA and comments intact.
SQL IN list
Turn a pasted spreadsheet column or one-value-per-line TXT file into a quoted SQL IN fragment.
CSV to SQL INSERT
Generate reviewable PostgreSQL or MySQL INSERT scripts from CSV for an existing table.
cURL to fetch
Convert a copied cURL API request into browser fetch code.
HTTP headers parser
Inspect a copied HTTP header block and preserve repeated fields in JSON.
ENV and JSON converter
Convert .env assignments to a string-valued JSON object or environment list, with exact value checks.
Cron expression checker
Check a five-field Unix cron schedule and preview its next matching minutes in a chosen time zone.
chmod calculator
Translate octal permissions including setuid, setgid and sticky bits.
IPv4 subnet and netmask calculator
Calculate IPv4 subnet boundaries and usable endpoints, or convert a netmask and prefix.
IP range to CIDR
Turn an inclusive IPv4 address range into the smallest exact list of CIDR blocks.
Aggregate CIDR blocks
Reduce an IPv4 CIDR list without changing its address coverage.
IPv4 number converter
Convert one IPv4 address between dotted decimal, unsigned integer and 32-bit binary.
IPv6 expand and compress
Convert one IPv6 address to canonical, expanded and colon-free 32-digit forms.
IPv6 subnet calculator
Find the exact start, end and size of one IPv6 prefix.
MAC address normalizer
Convert MAC addresses between colon, hyphen, Cisco dotted and plain formats, including short and Python hex octets.
IP address validator
Validate one IPv4 or IPv6 address per line and export the valid entries.
IP in CIDR checker
Check a list of IP addresses against one IPv4 or IPv6 CIDR and export matching values.
Base32 encoder / decoder
Encode text or any file as RFC 4648 Base32, or decode Base32 to the original bytes.
Hex and text converter
Encode text or file bytes as hex and Base64 of the same bytes, or decode plain hex to exact bytes.