QR code generator
Make a downloadable QR code for a link or text.
Categories
Developer
Encoding changes representation; it does not encrypt or protect a secret. Choose the matching decoder for Base64, URL percent encoding or HTML entities. Format JSON for readability and minify it for compact output; validate a result before using it in production.
Developer
74 Results
Developer
DOI metadata lookup
Look up one Crossref DOI and export attributed metadata as JSON, BibTeX or plain text.
Offline opening test
Inspect a local HTML package and run an isolated offline preview.
Table locale rehearsal
Inspect cell-level date, decimal and separator risks.
Interface collision test
Run long text, RTL, large text and narrow layout checks.
Site migration damage map
Compare bounded crawl evidence for old and new URLs.
First visit study
Create a consented prototype task and inspect real participant sessions.
What do I open first?
Inspect actual package files and create an opening guide.
Bulk product catalog workspace
Prepare a product CSV, convert reference prices, translate selected text and review food barcode suggestions before export or an authorized store import.
CSV & Excel column mapper
Map CSV or XLSX columns to your own schema, validate each row and export safe text-preserving workbooks.
CSV & Excel chart report
Create a bar or line chart from your own spreadsheet data, inspect excluded rows and download a PNG, SVG or PDF report.
Etsy keyword & shop data research
Review listing keywords, compare your recorded search observations and analyze your own sales CSV. Use a free KitForma account; your imported file stays on your device.
Etsy bulk draft uploader
Prepare digital and physical listings from CSV, match product photos and files, and review a draft-only import for your own connected Etsy shop.
Shopify CSV checker & fixer
Check product CSV files before a Shopify import. Inspect row errors, preserve SKUs and barcodes, and download reviewed corrections locally.
JSON Formatter
Validate JSON and format it with consistent indentation.
JSON Minifier
Validate JSON and remove unnecessary formatting whitespace.
CSV to JSON
Convert a header-based CSV table into an array of JSON objects.
JSON to CSV
Convert a JSON array of objects into an escaped CSV table.
Base64 Encoder
Encode Unicode text as UTF-8 Base64.
Base64 Decoder
Decode standard or URL-safe Base64 into UTF-8 text.
URL Encoder
Percent-encode a URL component or a complete URL.
URL Decoder
Decode percent-encoded text with an optional form-style plus conversion.
HTML Escape
Encode five HTML-sensitive characters as entities.
HTML Unescape
Decode common named entities and valid numeric character references.
HTML Minifier
Conservatively remove standalone HTML comments while preserving document whitespace.
CSS Minifier
Conservatively compact CSS formatting outside strings and custom values.
CSS Beautifier
Indent CSS blocks and put declarations on separate lines.
JWT Decoder
Inspect the header and payload of a three-part JSON Web Token.
UUID Generator
Generate random version 4 UUIDs using Web Crypto.
Password Generator
Generate passwords with a selected set of character groups.
Hash Generator
Calculate a SHA digest of UTF-8 text using Web Crypto.
Regular Expression Tester
Test a bounded regular-expression subset without backtracking.
Query String Parser
Inspect URL query parameters while preserving repeated keys.
Timestamp Converter
Convert Unix seconds or milliseconds to UTC, or an explicit ISO date to Unix time.
Color Converter
Convert opaque hex, RGB, or HSL colors to common CSS formats.
Color Contrast Checker
Calculate the WCAG contrast ratio between two opaque sRGB colors.
Data Size Converter
Convert bits, bytes, decimal units, and binary units.
Unicode character inspector
Inspect code points and UTF-8 bytes, including invisible characters.
Unicode escape converter
Encode text as Unicode escapes or decode strict Unicode escape sequences.
CSV structure validator
Check quoting, row widths, empty headers and duplicate column names.
Transpose CSV
Exchange CSV rows and columns while preserving quoted cell values.
Pick CSV columns
Export selected columns in the order you specify.
Sort CSV rows
Sort records by one column while preserving the header.
Deduplicate CSV records
Keep the first record for each unique row or selected key column.
CSV delimiter converter
Convert comma, semicolon and tab delimiters with correct cell quoting.
Merge CSV tables
Append rows from two CSV tables with identical headers.
CSV column statistics
Summarize a numeric column and report missing cells.
JSON Pointer query
Retrieve a value by an RFC 6901 JSON Pointer without evaluating code.
Flatten JSON paths
Represent nested JSON as JSON Pointer paths and leaf values.
Filter a JSON array
Select object records whose field equals a typed JSON value.
Infer JSON Schema
Build a draft JSON Schema describing the supplied sample data.
Compare JSON values
Report changed, added and removed JSON paths independently of key order.
JSON ↔ NDJSON
Convert a JSON array to newline-delimited JSON and back.
JSON to TypeScript type
Generate a TypeScript type from a sample, including mixed arrays.
Apply JSON Merge Patch
Apply an RFC 7396 merge patch locally and inspect the result.
JSON to SQL INSERT
Prepare quoted SQL INSERT statements from flat JSON records.
CSV to HTML table
Generate a semantic HTML table with escaped text cells.
URL query builder
Add or replace query parameters using an array of key/value pairs.
Campaign URL builder
Add campaign source, medium and campaign parameters to a link.
URL inspector
Inspect the protocol, hostname, port, path, query and fragment of a URL.
HTTP header parser
Inspect pasted HTTP headers while preserving repeated field values.
robots.txt builder
Prepare a simple crawler policy with paths and an optional sitemap.
XML sitemap builder
Build an escaped URL sitemap from a list of absolute web addresses.
UUID inspector
Inspect the version, variant and canonical representation of a UUID.
Base64 ↔ Base64URL
Convert a valid Base64 byte encoding to URL-safe form or back.
UTF-8 text ↔ hexadecimal
Convert UTF-8 text to hex bytes or decode valid UTF-8 hex.
Fluid CSS clamp calculator
Create a fluid pixel-based size between two viewport widths.
CSS gradient builder
Build a linear gradient from two to twelve hex color stops.
CSS box shadow builder
Generate a box shadow with controlled offset, blur, spread and opacity.
HMAC signature generator
Compute an HMAC-SHA-256 signature from a UTF-8 message and secret.
CRC-32 checksum
Calculate the standard CRC-32/ISO-HDLC checksum of UTF-8 text.
ISBN validator
Check ISBN-10 or ISBN-13 check digits and convert valid ISBN-10 values.
GTIN check digit
Calculate or verify a GTIN-8, GTIN-12, GTIN-13 or GTIN-14 check digit.
Color palette exporter
Turn hex color swatches into CSS custom properties or a JSON token file.
Showing 24 of 74 tools.