The .ttag file format

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The .ttag inventory-interchange file is a portable, offline snapshot of one or more inventory materials. It is the unit for backing up your filaments, carrying them on a USB stick, and sharing them — between accounts, between tools, or as ready-made brand/range collections.

Introduced in Tiger Studio Manager v2.14.0 (export + import). The format is stable and cross-app: third-party tools, a future web playground that generates .ttag files, and prepared filament collections all build on this spec.

File shape

A .ttag file is a single UTF-8 JSON document:

{
 "format": "tigertag",
 "kind": "ttag",
 "version": 1,
 "exportedAt": "2026-07-24T00:00:00.000Z",
 "exportedBy": "<owner uid>",
 "records": [ /* inventory documents, verbatim */ ],
 "rfidBackups": { "<chipUid>": { /* signed factory dump */ } }
}

Field	Meaning
`format` / `kind`	Always `"tigertag"` / `"ttag"` — the identification pair checked on import
`version`	Format version; currently `1`
`exportedAt`	Export time, ISO 8601 string (e.g. `"2026-07-24T00:00:00.000Z"`)
`exportedBy`	Exporting owner’s uid — a UX hint for choosing the import mode ONLY, never a security boundary
`records[]`	Inventory documents, carried verbatim
`rfidBackups`	Optional. Keyed by chip UID; present only for TigerTag+ (certified) spools — the signed factory dump used to restore the chip

records[] are the Firestore inventory documents, verbatim — exactly users/{uid}/inventory/{spoolId} as documented in the canonical data model (use it as the field dictionary). Three nuances:

Fields are sparse — a field is only written when present on the doc: twin_tag_uid only on twins, rfidBackup: true only on TigerTag+, id_product only when known, and so on.
URL fields are attacker-controlled — LinkTDS, LinkMSDS, LinkYoutube, LinkREACH, LinkROHS, LinkFOOD and url_img* are sanitised on import: any non-http(s) scheme is dropped.
Rack placement travels but doesn’t apply — rack, rack_id, level, position may appear in the file but are not meaningful on import (an imported spool does not inherit the exporter’s rack).

Required vs optional fields

At file level:

Field	Status
`format` = `"tigertag"`, `kind` = `"ttag"`, `version` ≤ 1	Required — missing or mismatched = the file is rejected
`records[]`, non-empty	Required — an empty file is rejected
`exportedAt`, `exportedBy`	Informative (`exportedBy` is a UX hint only)
`rfidBackups`	Optional — present only when TigerTag+ spools are included

At record level:

Category	Fields
Required	`uid` (`TigerData_<id>` or chip UID) · `id_brand`
Core identity (present on every well-formed record)	`id_material`, `id_type`, `id_aspect1`, `id_tigertag` — resolved against the shared reference database
Capacity	Normalized from `measure` + `id_unit`: `measure_gr` in grams for solids (e.g. `measure: 1` + kg → `measure_gr: 1000`) and `measure_ml` in milliliters for liquids (resins). Generators may provide `measure` + `id_unit`; the normalized value is the canonical stored one
Common optional	color fields (`color_r/g/b`, `online_color_list`…), `weight_available`, `container_id` / `container_weight`, display strings (`material`, `series`, `color_name`), `TD`, `tags`, `sku` / `barcode`, `Link`, `url_img`
Conditional	`twin_tag_uid` (twins only — reciprocal within the file) · `rfidBackup: true` plus a matching `rfidBackups` entry (TigerTag+ only) · `id_product` (known catalogue products only)
Carried but ignored on import	`rack`, `rack_id`, `level`, `position`

For any edge case not covered here, the Tiger Studio importer is the reference implementation — third-party generators should aim at records a stock Studio accepts.

Rules baked into the format:

Two timestamp conventions, by design. The root exportedAt is an ISO 8601 string. Timestamps inside records[] (updatedAt, and the legacy variants updated_at / last_update) are epoch-ms numbers — Firestore Timestamps are converted by the serialiser so the file serialises cleanly. Don’t “fix” one to match the other: files in the wild already carry this shape.
Twins are atomic. A twinned material always exports both sides — one material → two records, linked by twin_tag_uid. A half-twin is never produced.
Id discipline. Only chipless TigerData_<id> ids may appear; a legacy CLOUD_<id> id is refused at export time.

Media type

The canonical media type is application/vnd.tigertag.ttag+json — it matters where a .ttag is served over http(s) (the Content-Type a web playground, a CDN or a brand-collection host should send). application/json is also accepted. A file on disk carries no MIME — it is identified by its .ttag extension and, authoritatively, by its content: importers validate by content (format/kind/version), never by MIME header or file extension alone.

Availability

Export and import ship in Tiger Studio v2.14.0+. The format is designed to be portable; other surfaces may adopt it over time — today, Studio is the reference implementation.

What a `.ttag` can carry

All three spool tiers export and import:

Tier	In the file
TigerData (fully digital, no chip)	The record itself
TigerTag (a written chip)	The record itself
TigerTag+ (certified chip)	The record plus its signed factory dump in `rfidBackups`

Export

Single spool — from the spool’s detail toolbox → a file named brand-material-color.ttag.
Multi-selection — select several spools, toolbar Export button → a file named tigertag-selection-<date>.ttag.
Export is available for the user’s own inventory only.

Import — validate → preview → accept

The importer accepts several .ttag files at once: browse, paste an http(s) link, or drag-and-drop anywhere on the window.

Validate. Each file must carry the format/kind pair and version ≤ 1. A non-.ttag file, a newer version, or an empty file is rejected. Each record must then carry the full chip payload — see Required fields below.
Sanitise. File contents are untrusted input: non-http(s) URL fields are dropped; colour, weight and TD values are clamped to valid ranges.
Preview. Every material is shown in a preview table with a per-material include checkbox.
Accept in one of two modes — pre-hinted from exportedBy, freely switchable:

	Restore	Import
Intent	Same account / a genuine restore	Adopting someone else’s materials
Record ids	Kept — written verbatim under the original ids	New ids — each record becomes a fresh chipless `TigerData_` spool owned by the importer
TigerTag+ status	Kept — each `rfidList` backup restored	Dropped — the copy is chipless, so `id_tigertag` is removed (which is what makes it not a TigerTag+), `id_product` unset, `rfidBackup:false`; backups discarded (a signed dump is bound to a chip the importer doesn’t hold)
Weight	As recorded	Reset to full capacity
Twins	As recorded	`twin_tag_uid` remapped through the new ids

Required fields — a record must be able to make a chip

A .ttag exists to create TigerTag / TigerTag+ chips. A record that cannot produce one is not a partial record, it is an unusable one — so since Tiger Studio 2.15.0 the importer refuses it outright rather than importing a spool that looks fine and is silently wrong.

A record is accepted only if it carries uid plus these 24 numeric fields, each present and finite (null and "" do not count as present — beware, Number(null) is 0):

Group	Fields
Identity ids	`id_brand`, `id_material`, `id_type`, `id_aspect1`, `id_aspect2`, `id_diameter`, `id_measure_unit`, `id_version`, `id_product`
Quantity	`measure`
Colour	`color_r`, `color_g`, `color_b`, `color_a`
Per-type payload	`data1` … `data7`
Stamp	`timestamp`

Plus id_tigertag, but only if the record has a chip. That field names the chip’s version in id_version.json, where exactly four values are legal — 0 RFID Empty, 1542820452 TigerTag, 1816240865 TigerTag Init, 3155151767 TigerTag+. A chipless record (uid starting TigerData_ or the legacy CLOUD_) has no chip and therefore no version, so it must not carry the field at all; it is written for the first time when a real chip is programmed. Never invent a value for it, and never resolve one without checking the record has a chip.

Everything else in a record — names, images, price, notes, rack position — is enrichment: nice to carry, never required.

A material is atomic. A twin pair passes only if both of its records do; a half-valid twin is refused whole, because importing one side of a pair would create a spool whose partner can never be written.

Refusals are counted and shown, never silent. The preview reports how many materials were turned away, so a bad export is visible instead of quietly losing half its content. Writers of .ttag files should validate against this list before shipping a file to users.

Complete example

A faithful, anonymized multi-selection export — one TigerData, one twin pair (reciprocal twin_tag_uid), one TigerTag+ with its signed backup:

{
 "format": "tigertag",
 "kind": "ttag",
 "version": 1,
 "exportedAt": "2026-07-24T00:00:00.000Z",
 "exportedBy": "AbCdEf0123456789GhIjKlMnOpQr",
 "records": [
  {
   "uid": "TigerData_9F3A2B1C",
   "id_brand": 12, "id_material": 3, "id_type": 1,
   "id_aspect1": 2, "id_aspect2": 0, "id_tigertag": 74213,
   "material": "PLA Basic", "color_name": "Sky Blue",
   "color_r": 88, "color_g": 170, "color_b": 220,
   "online_color_list": "58AADC", "online_color_type": 1,
   "measure_gr": 1000, "weight_available": 640,
   "container_id": 3, "container_weight": 215,
   "TD": 0, "tags": ["desk", "prototyping"],
   "rfidBackup": false, "updatedAt": 1769212800000
  },
  {
   "uid": "04A1B2C3D4E5F6",
   "id_brand": 5, "id_material": 3, "id_type": 1,
   "id_aspect1": 4, "id_tigertag": 55010,
   "material": "PLA Silk", "color_name": "Gold",
   "color_r": 212, "color_g": 175, "color_b": 55,
   "online_color_list": "D4AF37",
   "measure_gr": 1000, "weight_available": 500,
   "container_id": 3, "container_weight": 215,
   "twin_tag_uid": "04F6E5D4C3B2A1",
   "rfidBackup": false, "updatedAt": 1769212800000
  },
  {
   "uid": "04F6E5D4C3B2A1",
   "id_brand": 5, "id_material": 3, "id_type": 1,
   "id_aspect1": 4, "id_tigertag": 55011,
   "material": "PLA Silk", "color_name": "Emerald",
   "color_r": 0, "color_g": 130, "color_b": 90,
   "online_color_list": "00825A",
   "measure_gr": 1000, "weight_available": 500,
   "container_id": 3, "container_weight": 215,
   "twin_tag_uid": "04A1B2C3D4E5F6",
   "rfidBackup": false, "updatedAt": 1769212800000
  },
  {
   "uid": "04112233445566",
   "id_brand": 5, "id_material": 8, "id_type": 1,
   "id_aspect1": 2, "id_tigertag": 90887, "id_product": 4412,
   "material": "PETG HF Basic", "series": "Hyper PETG",
   "color_name": "Green",
   "color_r": 0, "color_g": 160, "color_b": 70,
   "online_color_list": "00A046",
   "measure_gr": 1000, "weight_available": 480,
   "container_id": 3, "container_weight": 215, "TD": 6,
   "LinkTDS": "https://example-brand.example/tds/petg-hf-basic.pdf",
   "sku": "RFHPPETG175GN1",
   "rfidBackup": true, "updatedAt": 1769212800000
  }
 ],
 "rfidBackups": {
  "04112233445566": {
   "firstSeen": 1767139200000,
   "backup": "0411223344556680048000000000E110122F0300FE0000A5A5C0FFEE112233445566778899…"
  }
 }
}

Reading the example: the first record is chipless (a TigerData_ id); the next two are a twin pair — same material, reciprocal twin_tag_uid, always exported together; the last is a TigerTag+ (rfidBackup: true) whose signed factory dump sits in rfidBackups under its chip UID.

Security / trust model

A .ttag file is untrusted input. Every record is sanitised on import (see above). exportedBy only pre-selects the mode in the UI — the real authorisation boundary is the Firestore Security Rules. Never treat file contents as authoritative for identity or ownership.