Small tools and experiments
Useful things, made one at a time.
ototema is a collection of focused web tools and small experiments. Each one is designed to do one job clearly.
Category
Image & Media
Inspect, clean, and convert images locally in your browser.
Image Provenance Checker
Inspect C2PA Content Credentials, EXIF, and GPS metadata locally in your browser.
Open tool →AvailableImage Privacy Cleaner
Create a fresh share copy of an image without carrying common file metadata into the output.
Open tool →PrototypePhoto Match Camera
Recreate a reference photo’s composition with a translucent live camera guide. No uploads.
Open tool →AvailableWebP Converter
Convert JPEG, PNG, and WebP images locally in your browser without uploading them.
Open tool →Category
Text & File Utilities
Small local tools for cleaning text and inspecting files.
Text Formatter
Trim, clean, deduplicate, sort, and normalize text locally in your browser.
Open tool →AvailableUnicode Inspector
Inspect code points, invisible characters, grapheme counts, and Unicode normalization forms.
Open tool →AvailableChecksum Verifier
Calculate and compare SHA-256, SHA-384, or SHA-512 file checksums locally with Web Crypto.
Open tool →Category
Web & AI Diagnostics
Inspect websites for search, AI retrieval, and agent-readiness signals.
SEO Inspector
Inspect HTTP status, redirects, content type, X-Robots-Tag, and other technical SEO evidence for a public URL.
Open tool →BetaGEO Inspector
Inspect AI crawler access, llms.txt discovery, and page-level generative retrieval evidence for a public URL.
Open tool →BetaAgent Readiness Checker
Inspect static HTML evidence for named controls, form semantics, and emerging WebMCP integration.
Open tool →Category
Travel & Local
Focused local tools built around useful public data.
Kyoto Public Toilet Finder
Find free public toilets in Kyoto, filter facilities, and sort by distance using your location.
Open tool →AvailableKyoto Free Bottle Refill Finder
Find free My Bottle refill stations published by Kyoto City and sort them by distance.
Open tool →AvailableKyoto Smoking Area Finder
Find designated smoking areas and read Kyoto City's street-smoking guidance.
Open tool →Category
Experiments
Early-stage ideas and technical prototypes under active validation.