40 free tools, no sign-up
Tools for web developers that just work
Minify code, generate QR codes, build tracking links, look up domains and more. Most tools run right in your browser.
AI support
Docs and helpers for coding with an AI agent.
Code
Minify, compare and reshape code and data.
JS & JSON Minifier / Beautifier
Compress or pretty-print JavaScript and JSON.
Open toolInline JS Deferrer
Turn inline scripts into deferred, non render-blocking tags.
Open toolCSS Minifier & Beautifier
Compress, deduplicate or format stylesheets.
Open toolHTML Minifier & Beautifier
Format markup, or compress it without touching script and style.
Open toolRegex Tester
Try a JavaScript regular expression and inspect each match.
Open toolText Diff
Compare two texts line by line.
Open toolCSV to JSON
Turn a spreadsheet export into JSON.
Open toolJSON to CSV
Turn a JSON array into a CSV file for Excel.
Open toolHTML Entity Encode / Decode
Escape text for HTML, or turn entities back into characters.
Open toolMarkdown Preview
Preview Markdown as you type. HTML in the text stays as text.
Open toolCase Converter
camelCase, snake_case, kebab-case, Title Case and more.
Open toolChmod Calculator
Translate between 755, rwxr-xr-x and permission checkboxes.
Open toolSEO & Marketing
Crawl rules, meta tags, structured data and links.
Robots.txt Generator
Build a robots.txt with path rules, AI crawler blocks and sitemaps.
Open toolCampaign URL Builder
Add UTM parameters to any link.
Open toolMeta Tag Generator
Title, description, canonical and Open Graph tags.
Open toolJSON-LD Generator
Organization, article, FAQ and breadcrumb structured data.
Open toolSitemap.xml Generator
Build a sitemap from a list of URLs.
Open toolSlug Generator
Turn a title into a URL slug, including Turkish characters.
Open toolHreflang Tag Generator
Language alternates as link tags, an HTTP header or sitemap entries.
Open toolRedirect Generator
301 and 302 rules for Apache .htaccess and Nginx.
Open toolDomain & Network
Domains, IDN names, IP addresses and subnets.
Whois Domain Lookup
See registration details of a domain.
Open toolIDN / Punycode Converter
Convert international domain names to and from punycode.
Open toolBrowser & IP Info
Your IP, location, user agent and screen size.
Open toolSubnet Calculator
Network, broadcast and usable hosts for an IPv4 CIDR.
Open toolGenerators & Encoders
QR codes, barcodes, icons, passwords, hashes and encodings.
Stylish QR Code Generator
QR codes for a link, Wi-Fi or vCard, with colours and a logo.
Open toolBarcode Generator
Code 128, EAN-13 and Code 39 barcodes as SVG or PNG.
Open toolFavicon & PWA Icon Generator
Slice one image into favicon and PWA PNG sizes, plus an ICO.
Open toolWebP & AVIF Converter
Convert a photo to WebP or AVIF, in the browser.
Open toolUUID / GUID Generator
Random version 4 UUIDs, in bulk.
Open toolBase64 Encode / Decode
Encode or decode UTF-8 text and files as Base64.
Open toolURL Encode / Decode
Percent-encode a query value or a whole URL.
Open toolHash Generator
MD5, SHA-1 and SHA-256 checksums of any text.
Open toolUnix Timestamp Converter
Convert seconds or milliseconds to a date, and back.
Open toolJWT Encoder / Decoder
Read a token, or sign a new HS256 JWT in your browser.
Open toolCron Expression
Explain a five-field cron expression and list the next runs.
Open toolColor Converter
Convert hex, RGB and HSL, and check the contrast ratio.
Open toolHMAC Generator
Sign text with a shared secret using HMAC-SHA256.
Open toolPassword Generator
Strong random passwords, generated on your device.
Open toolNumber Base Converter
Binary, octal, decimal and hexadecimal, at any size.
Open toolStays on this machine Encoders, hashes and generators run in the browser. What you paste is not uploaded.
No account Open a tool and use it. There is no sign-up and no usage cap.
The small jobs Minify a file, decode a token, build a tracking link, check a domain, then get back to the work.