Elofyn · Tools
Small, sharp utilities. No uploads.
Each tool runs entirely in your browser. We never see your input, your files, or your data.
20 of 20 live · 20 total
Encoders / decoders
4PNG · SVG
QR Code Generator
Paste a URL or text. Get a scannable QR code with customizable colors and error correction. Download as PNG or SVG.
/tools/qr-code
Image · Webcam
QR Code Decoder
Drop an image or use your webcam to scan a QR code and return the encoded payload. Pairs with the QR generator.
/tools/qr-decode
Bidirectional
Base64 / URL / HTML Encoder–Decoder
Tabbed UI for Base64, URL-percent, and HTML-entity encoding and decoding. Bidirectional, instant, no roundtrip.
/tools/base64
Decode-only
JWT Decoder
Paste a JWT to inspect header, payload, and signature bytes. Decode-only — never trust unverified tokens.
/tools/jwt
Converters
8Up to 1 MiB
JSON ↔ YAML Converter
Convert between JSON and YAML in your browser. Auto-detects direction, handles 1 MiB inputs, never sends your data anywhere.
/tools/json-yaml
HEX · RGB · HSL
Color Palette Extractor
Drop an image, get a 3–12 swatch palette in HEX, RGB, HSL. Export as CSS variables, JSON, or a PNG strip.
/tools/color-palette
Live preview
Markdown ↔ HTML Converter
Live side-by-side preview powered by remark. Paste either side, get the other rendered instantly.
/tools/markdown-html
Bidirectional
CSV ↔ JSON Converter
Auto-detects delimiters and quoted fields, toggles header rows, and converts in either direction.
/tools/csv-json
HEX · RGB · HSL · HSV
Color Converter
Convert between HEX, RGB, HSL, and HSV with a live swatch preview. Pairs with the palette extractor.
/tools/color-convert
Bin · Oct · Dec · Hex
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal with live, bidirectional input.
/tools/base-convert
Imperial ↔ metric
Unit Converter
Convert length, weight, and temperature between imperial and metric units.
/tools/unit-convert
Seven cases
Text Case Converter
Switch between upper, lower, Title, Sentence, camelCase, snake_case, and kebab-case in one place.
/tools/case-convert
Generators
5Entropy meter
Password Generator
Generate strong passwords with an entropy meter, length slider, and character-class toggles.
/tools/password
v4 · v7
UUID Generator
Generate v4 or v7 UUIDs with an optional prefix. Bulk generate up to 100 at once.
/tools/uuid
Words · Sentences · Paragraphs
Lorem Ipsum Generator
Real Lorem Ipsum by words, sentences, or paragraphs — not “the quick brown fox.”
/tools/lorem
SHA-256 · SHA-1 · MD5
Hash Generator
Compute SHA-256, SHA-1, and MD5 digests via SubtleCrypto, live as you type.
/tools/hash
URL-safe
Slug Generator
Turn arbitrary text into URL-safe slugs. Unicode-aware, with no surprises on diacritics.
/tools/slug
Heavy / interactive
3Live · Groups
Regex Tester
Real-time match highlighting, capture-group breakdowns, and a live replacement preview.
/tools/regex
Next 5 runs
Cron Expression Explainer
Parse a cron string, get a plain-English description, and preview the next five run times.
/tools/cron
PNG · JPG → WebP
Image Compressor
Compress PNG and JPG images to WebP via Canvas. Quality slider with a before / after size readout.
/tools/image-compress
More tools shipping every Friday.