Developer tools that don't suck.
Free, private, in-browser. No uploads, no signup, no ads chasing you across the web. Built by a developer who got tired of closing cookie banners.
Base64 Encode / Decode
Bidirectional Base64 with UTF-8 support and URL-safe output.
Case & Slug Converter
camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, slug.
Color Converter
HEX ↔ RGB ↔ HSL, bidirectional, with live color preview.
Color Palette Generator
Generate complementary, analogous, triadic, tetradic and monochromatic palettes from any base color.
Cron Expression Parser
5-field cron parser. Next N run times, human-readable description.
CSS Unit Converter
px / rem / em / pt. Set root font-size, get every equivalent at once.
CSV ↔ JSON
CSV ↔ JSON, both directions. Handles quotes, commas and newlines.
Hash Generator
MD5 + SHA-1/256/384/512. UTF-8 safe, hex output, copy each.
HMAC Generator
Compute HMAC-SHA1/256/384/512 from a secret and a message, live in the browser.
HTTP Status Codes
Browse and search all HTTP 1xx-5xx response codes with clear descriptions.
Image ↔ Base64
Convert images to base64 data URLs and back, with live preview and file-size readout.
IP Lookup
Your public IP, ISP, ASN, country, city and timezone at a glance.
JSON Formatter
Pretty-print, minify and validate JSON. 2/4-space or tab indent.
JWT Decoder
Decode JWT header + payload as JSON. Expiry check, base64url.
Lorem Ipsum Generator
Filler text for mockups. Pick paragraph count, length and starting words.
Markdown Preview
Live Markdown → HTML renderer with GitHub-flavored syntax and DOMPurify sanitization.
Nano ID Generator
Secure Nano IDs. Custom size, alphabet, URL-safe mode. Batch generate.
Number Base Converter
bin ↔ oct ↔ dec ↔ hex. BigInt for arbitrary precision.
Password Generator
Strong passwords via Web Crypto. Pick length, charsets, quantity. No upload.
PEM Viewer
Detects the PEM type, decodes the base64 body and shows the DER byte length and hex preview.
QR Code Generator
Generate downloadable QR codes from any text or URL, with adjustable size and error correction.
Quick Notes
Autosaving Markdown scratchpad — write, click to render. Stays in your browser.
Regex Cheatsheet
A searchable reference of regex anchors, classes, quantifiers, groups and common patterns.
Regex Tester
Live regex testing with flags (g/i/m/s/u), match highlighting, groups.
Snowflake Decoder
Decode Discord, Twitter/X, Instagram, Slack Snowflake IDs to creation timestamps.
Text Diff
Line-by-line diff between two texts. Highlights additions and deletions.
Time Zone Converter
Pick a time and source zone, read it in 20+ timezones instantly.
Unix Timestamp Converter
Epoch ↔ date converter. Seconds or milliseconds, UTC + local.
URL Encode / Decode
encodeURI / encodeURIComponent and their decode counterparts.
URL Parser
Break any URL into its parts. Lists every query parameter, decoded.
UUID Generator
Generate random v4 UUIDs. Batch mode, uppercase, braces, no hyphens options.
Word Counter
Words, characters, sentences, paragraphs + reading time. Updates as you type.
YAML Converter
Convert between YAML and JSON in either direction, with live error reporting.