Tool library
Find the right tool.
Fast, focused, and entirely client-side — no account, no upload.
Scan & inspect
QR Inspector
Reveal exactly what a code contains. Nothing opens automatically.
QR Generator
Turn a link or any text into a downloadable QR code.
Network
Subnet Calculator
Calculate IPv4 ranges, masks, broadcasts, and usable hosts.
Connection Info
Check whether you’re online — plus connection type and local IP in the mobile app.
IP Lookup
See your public IP, and classify any address or CIDR you paste.
Link Inspector
See where a link really goes, spot lookalike sites, and strip its tracking parameters.
Create
QR Generator
Turn a link or any text into a downloadable QR code.
Secure Generator
Create strong passwords and random UUIDs entirely on-device.
Hash Generator
SHA-1/256/384/512 digests and CRC-32 checksums of any text.
Convert
Text Encoder
Encode and decode Base64 or URL-safe text without uploading it.
Timestamp Converter
Move between Unix timestamps, local time, and ISO 8601.
Base & Unit Converter
Convert numbers between binary, octal, decimal, and hex — plus data sizes and temperatures.
Cron Explainer
Explain a schedule in plain language and list its next five runs.
Color & Contrast
Convert between hex, RGB, and HSL — and check WCAG contrast ratios.
Text Toolkit
Sort, dedupe, clean, and find-replace whole blocks of text in one pass.
JSON Formatter
Format, minify, and validate JSON, with the exact line and column of any error.
CSV ⇄ JSON Converter
Turn spreadsheet exports into JSON and back, with quoted fields handled properly.
Everyday Units
Length, weight, volume, area, speed, and temperature, converted to every unit at once.
Time Zone Planner
Compare places at a glance and find the hours when everyone is at work.
Image Shrinker
Resize, compress, and convert images to JPEG, WebP, or PNG.
PDF Merge & Split
Combine PDFs, pull out pages, or split one into separate files.
Files
File Checksum Verifier
Get a file’s SHA-256 and check it against the value a download page publishes.
Image Shrinker
Resize, compress, and convert images to JPEG, WebP, or PNG.
Photo Metadata Cleaner
See the location, device, and time hidden in a photo, and save a copy without them.
PDF Merge & Split
Combine PDFs, pull out pages, or split one into separate files.
Calculator
Subnet Calculator
Calculate IPv4 ranges, masks, broadcasts, and usable hosts.
Base & Unit Converter
Convert numbers between binary, octal, decimal, and hex — plus data sizes and temperatures.
Tip Calculator
Work out the tip, the total, and each person’s share.
Discount Finder
Sale prices, savings, and tax in one pass.
Loan Calculator
Monthly payments, total interest, and payoff for any fixed-rate loan.
Date Calculator
Days between dates, or add days to any date.
Scientific Calculator
Safe expression evaluator — powers, roots, trig, and logs.
Ohm’s Law
Solve voltage, current, resistance, or power from any two.
Everyday Units
Length, weight, volume, area, speed, and temperature, converted to every unit at once.
Time Zone Planner
Compare places at a glance and find the hours when everyone is at work.
Inspect
JWT Inspector
Decode tokens — header, claims, expiry — and verify HS256 signatures locally.
ID Inspector
Pick apart UUIDs and ULIDs — version, variant, and embedded timestamps.
Regex Tester
Test patterns against your own text with live match and capture output.
Diff Checker
Compare two blocks of text line by line and see exactly what changed.
Certificate Viewer
Paste a PEM certificate and read its subject, SANs, validity, and key.
JSON Formatter
Format, minify, and validate JSON, with the exact line and column of any error.
Link Inspector
See where a link really goes, spot lookalike sites, and strip its tracking parameters.
Hidden Character Inspector
Reveal invisible characters, direction tricks, and lookalike letters in pasted text.
File Checksum Verifier
Get a file’s SHA-256 and check it against the value a download page publishes.
Photo Metadata Cleaner
See the location, device, and time hidden in a photo, and save a copy without them.
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