Find files, editable templates and browser test targets by what you need to make or test. The directory below is cut by format; the two collections under it cut the same library by subject and by workflow.
The exact answer for the lowcontrast variant of this receipt: every one of the 23 words with its string and pixel box, plus the transform that produced this variant. Authored before the image existed, so it is ground truth by construction rather than a second opinion.
The exact answer for the rot-7 variant of this receipt: every one of the 23 words with its string and pixel box, plus the transform that produced this variant. Authored before the image existed, so it is ground truth by construction rather than a second opinion.
The exact answer for the rot+3 variant of this receipt: every one of the 23 words with its string and pixel box, plus the transform that produced this variant. Authored before the image existed, so it is ground truth by construction rather than a second opinion.
The exact answer for the noise variant of this receipt: every one of the 23 words with its string and pixel box, plus the transform that produced this variant. Authored before the image existed, so it is ground truth by construction rather than a second opinion.
The exact answer for the clean variant of this receipt: every one of the 23 words with its string and pixel box, plus the transform that produced this variant. Authored before the image existed, so it is ground truth by construction rather than a second opinion.
A MovieLens-style ratings log: 240 user/item/rating events with Unix timestamps across 50 users and 40 items. A fixture for testing recommender pipelines, collaborative-filtering loaders, and sparse-matrix builders.
Machine-readable description of all 16 variants in this group: the file, the kind of damage, the measured parameters that produced it and what each one is expected to demonstrate. Provided so a test suite can walk the ladder programmatically instead of hard-coding filenames.
The same three references as an RIS citation file with two-letter tags and ER record terminators: the twin of the BibTeX file, for testing RIS import and BibTeX/RIS conversion.
A 2048-bit RSA private key in unencrypted PKCS#8 PEM: a deliberately PUBLISHED, sample-only key for testing PEM key parsers and PKCS#8 decoders. Never use it for anything real.
Where the original view of the exterior of a small independent bakery on a quiet street, awning and window display, morning light landed inside the expanded frame, as JSON: the rectangle 0,0 to 512,512 in a 512x704 canvas, the padding that produced it, and the 40-pixel feather that means the comparison must be inset. Authored BEFORE the expansion ran, so it is ground truth rather than a rectangle recovered afterwards by matching the original against the result - which is what a consumer would otherwise have to do, and which cannot distinguish a correct offset from a plausible one.
Where the original view of empty cafe interior before opening, chairs down, morning sun across tables landed inside the expanded frame, as JSON: the rectangle 0,128 to 512,640 in a 512x768 canvas, the padding that produced it, and the 40-pixel feather that means the comparison must be inset. Authored BEFORE the expansion ran, so it is ground truth rather than a rectangle recovered afterwards by matching the original against the result - which is what a consumer would otherwise have to do, and which cannot distinguish a correct offset from a plausible one.
Where the original view of a cluttered joinery workshop bench with hand tools and sawdust, window light from the left landed inside the expanded frame, as JSON: the rectangle 0,0 to 512,512 in a 704x512 canvas, the padding that produced it, and the 40-pixel feather that means the comparison must be inset. Authored BEFORE the expansion ran, so it is ground truth rather than a rectangle recovered afterwards by matching the original against the result - which is what a consumer would otherwise have to do, and which cannot distinguish a correct offset from a plausible one.
A sample JSON Web Token (JWT) signed with HS256 using a published example secret (verifiable but powerless) for testing JWT decoders and validators. Sample only, never for production. Paired with its decoded claims.
The decoded header and payload of the sample JWT as JSON, alongside the public signing secret and algorithm: the ground truth for checking a JWT decoder's output.
A directed service-dependency graph in GraphML: ten microservices (web, api, auth, db, cache, queue, worker, …) with their call/dependency edges. A fixture for testing directed-graph importers, cycle detection, and topological sorting.