100% local WebAssembly and CLI verification for Unity, Godot, and Unreal

Catch missing CJK glyphs, broken tokens, and audio clicks before Steam players do.

Your development machine silently borrows system fonts that never travel inside your build. TofuCheck diffs your .csv, .po, and .json strings against bundled .ttf font tables and repairs .wav loop boundaries in 3.8 seconds.

Get TofuCheck Studio Pass · $29 once Run free sample scan in browser

Zero cloud uploads: assets stay on your disk Includes npx tofucheck CLI and GitHub Action Replaces $600/yr enterprise LQA seats

tofucheck audit · build_v0.9.4_nextfest

Load test fixture:

Inspected build inputs Local WASM engine ready

Drop your own .ttf, .otf, .csv, .po, .json, or .wav files here

100% client side binary parser · Or · get sample .zip

localization/ui_menus.csv

1,480 keys

Locales: en, zh_Hans, ja, ko, de, ru, pt_BR

fonts/PixelOperator_UI.ttf

cmap format 4

1,010 glyphs mapped · Fallback: NotoSansCJK_Subset.otf

What happens on a player Steam Deck without TofuCheck:

// Dev PC (borrows OS wqy-zenhei.ttc):

"开始游戏 → 继续冒险 (Lv. 12)"

// Player PC / Steam Deck (missing in .pck):

"□□□□ □ □□□□ (Lv. 12)" ← 7 hex boxes!

Scan time: 142 ms

3 release blockers detected across 7 locales

43 unique codepoints missing from bundled font chain · 2 broken placeholder tokens

CI exit code 1

MISSING_FONT_GLYPH · zh_Hans & ja Row 412 · KEY_MENU_CONTINUE

38 Han ideographs and arrow U+2192 (→) are absent from PixelOperator_UI.ttf and fallback chain.

Missing: U+2192, U+5F00, U+59CB, U+5192, U+9669 (+34 more) Auto fix: generated 1,842 char subset list

BROKEN_TOKEN_PARITY · de_DE & ru_RU Row 889 · NPC_BLACKSMITH_GREET

Source string requires {player_name} and [color=#ffd700]. LLM translation translated variable key to {spieler_name} and dropped closing [/color].

Impact: Runtime FormatException crash on dialogue open Auto fix: restored source token & closing tag

WAV_LOOP_DISCONTINUITY · audio/bgm_cavern.wav Sample 1,323,000 → 0

Loop boundary jumps from amplitude +0.418 to -0.092 with no smpl chunk header, causing an audible pop every 30.0s.

Delta: 0.510 FS step discontinuity Auto fix: 64 sample cosine zero crossing + smpl chunk

7,266

Playable demos in October 2026 Steam Next Fest competing for wishlists

28.4%

Next Fest AI disclosures citing translation and localization (+12.8 pts in 2026)

1,010

Total codepoints in Godot default UI font (zero CJK, Arabic, or arrow glyphs)

3.8s

Median local audit time for 14,620 strings, 6 fonts, and 48 WAV stems

Why local playtesting misses it

Your development machine is the single worst place to test whether players can read your game.

When you test Simplified Chinese, Japanese, Korean, Russian, or even a simple Continue → Next arrow on your workstation, your engine quietly borrows fallback fonts from your operating system. None of those system fonts travel inside your exported Steam .pck or Unity build.

Silent OS font borrowing

Godot and Unity shape 你好 using /usr/share/fonts or Windows system fallbacks during editor playtests. Nothing prints to the console, and get_string_size() returns a normal width.

font_rid=RID(0) valid=false → renders □□□ on clean Steam Deck

AI translation token corruption

Batch translating a 4,000 row CSV with DeepL or an LLM routinely mangles {0}, %d, [wave], or <sprite=2> tags, or expands German and Russian strings 42% past fixed UI container widths.

"{GoldAmount} Gold" → "{Золото} золота" (KeyNotFoundException)

Unmarked WAV loop boundaries

Exported ambient stems and DAW loops frequently lack embedded smpl chunk metadata or end on a non zero sample crossing, creating an immersion breaking click every time the loop wraps.

Sample[N-1] = +0.39 → Sample[0] = -0.14 (audible pop)

The pre launch verification standard

One missing glyph turns six months of worldbuilding into a day one Mixed review on Steam. Verify every character, token, and audio loop in four seconds flat.

Deterministic binary inspection

Built to fix the file, not just flag the row.

Every check runs offline in your browser or inside your GitHub Actions runner and outputs patched assets ready to drop straight back into your project repo.

TrueType & OpenType cmap parser

Exact Unicode coverage diff across your fallback chain

Drop in your primary UI font plus your CJK or Cyrillic fallback .ttf/.otf files alongside your localization table. TofuCheck parses binary cmap format 4 and format 12 subtables, flags every unrenderable codepoint by locale and translation key, and exports the exact deduplicated character set for Unity TextMeshPro Font Asset Creator or Godot 4 dynamic font preloading.

$ npx tofucheck ./locales/strings.csv --fonts ./fonts/*.ttf --out ./tmp_chars.txt

✓ Parsed 8,410 strings (9 locales) · 2,194 unique codepoints exported to tmp_chars.txt

Placeholder & markup linter

Zero broken variables or unclosed BBCode tags

Validates strict parity for C# {0} and named {item_count} tokens, printf %s/%d specifiers, Godot [color]/[img] BBCode stacks, and Unity RichText tags across every translated cell.

en_US: "Deal {0} [b]Fire[/b] dmg" Valid

es_ES: "Hace {o} [b]Fuego dmg" Fixed → {0} + [/b]

UI overflow & glyph width budget

Pixel width overflow alerts before layout clipping

Instead of guessing character counts, TofuCheck measures actual glyph advance widths (hmtx table) in your target font and flags German, Russian, or French strings that exceed your button or dialogue box width budget by more than 1.35x.

KEY_BTN_INVENTORY (de_DE) 164% of English pixel width

Lossless PCM WAV repair

Automatic zero crossing smoothing and RIFF smpl chunk injection

Batch scan your entire audio/sfx and audio/music directories. TofuCheck identifies loop start and end sample discontinuities, applies a micro cosine crossfade window at the boundary, and writes standard binary smpl loop markers recognized by Unity, Godot, and FMOD.

16 / 24 / 32 bit

Uncompressed PCM

< 1.5 ms window

Zero pitch shift

Batch ZIP export

Direct replacement

Simple, indie friendly licensing

Pay once. Run on every game you ship.

Enterprise localization suites charge $600 to $3,000 a year and still cannot read a binary .ttf font table or repair a .wav loop click. Own TofuCheck outright for the price of two indie games.

Browser Diagnostic

Free forever

$0 in browser

Instant sanity check for game jams and vertical slice demos.

Audit up to 250 strings and 2 locales per run
Inspect 1 primary .ttf or .otf font file
Single .wav loop discontinuity visualizer
100% local browser execution

Run free scan above

Quick Fix Pass

Single project

$12 single payment

Emergency auto-repair export & offline HTML app for 1 game build.

Auto-repaired .wav download with smpl chunk & zero-crossing micro-fade
TMP & Godot missing codepoint .txt export
Repaired .csv/.po/.json & Steam BBCode export
Standalone offline HTML app (no CLI or CI hooks)

Get Quick Fix Pass · $12 once

Studio Pass

Lifetime + CLI

$29 single payment

Unlimited projects, batch WAV/font exports, and offline Node CLI.

Everything in Quick Fix for unlimited games & locales
Offline Node CLI (npx tofucheck) for local build scripts
Batch folder scanner for multi-font fallback chains
Includes all 2.x updates for Unity 6, Godot 4 & UE5

Get Studio Pass · $29 once

Team & CI/CD Pack

Up to 10 seats

$49 single payment

Automated pull request gates for indie studios and publishers.

Everything in Studio Pass for up to 10 studio seats
Turnkey GitHub Action & GitLab CI workflow with SARIF output
Unity IPreprocessBuildWithReport & Godot EditorExportPlugin
HTML & Markdown LQA approval report generator

Get Team CI/CD Pack · $49 once

Interactive Error-String Fixers

Engine-Specific Diagnostic & Repair Guides

Part of the SpecFix Deterministic File-Fixer Network

Unity TextMeshPro / Godot 4 / Unreal UMG

Fix Unity TextMeshPro Missing CJK / Polish / Cyrillic Characters (Square Tofu Boxes □)

The character with Unicode value \u5263 was not found in the [Font Asset] font asset or any potential fallbacks.

Godot 4 / Unity AudioImporter / Unreal MetaSounds / FMOD

Fix Godot / Unity WAV Audio Loop Click & Pop at Seam + Inject RIFF smpl Loop Chunk

AudioStreamWAV loop mode Forward produces audible click/pop at loop wrap boundary; missing RIFF smpl chunk.

Unity / Godot 4 / FMOD Studio / Wwise

Inject RIFF smpl Loop Points into WAV Files for Unity, Godot & FMOD (Browser Binary Tool)

WAV file contains no smpl chunk; loop start/end points reset to 0 on engine re-import.

Steamworks Partner Portal / Unity Localization / I2 Localization

Steamworks Store Page BBCode Validator & Localization Placeholder ({0}, %s) Auto-Fixer

FormatException: Input string was not in a correct format (unclosed {0} or mismatched [list] BBCode tag).

Unity Localization / Unreal Engine / Godot

Unity & Unreal Localization CSV Placeholder ({0}, %s, ) Mismatch Scanner & Auto-Fixer

System.FormatException: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

Unreal Engine 5 Slate / UMG

Unreal Engine 5 UMG Font Atlas Missing Glyph & Localization CSV Codepoint Scanner

LogSlate: Warning: FontCache: Missing glyph for character U+0142 (Latin Small Letter L With Stroke).

Frequently asked questions

Does TofuCheck upload our unreleased script or game assets to any server?

Never. Both the browser diagnostic and the Studio Pass run 100% locally on your machine using client side WebAssembly and our offline CLI. Your dialogue CSVs, proprietary fonts, and audio stems never leave your disk, making it safe for NDA publisher builds.

How is this different from enabling pseudolocalization in Godot or Unity?

Pseudolocalization only swaps ASCII characters for accented Latin characters (such as Ĥéłłô) to test English string expansion. As the official Godot documentation notes, pseudolocalization cannot verify whether your bundled font files contain the thousands of CJK, Cyrillic, Arabic, or symbol codepoints present in your actual translated CSV or PO files.

Which game engines and localization formats are supported out of the box?

TofuCheck supports standard UTF8 CSV and TSV tables (Godot CSV, Unity Localization package, I2 Localization), GNU Gettext .po files, and flat or nested .json localization dictionaries, paired with .ttf and .otf fonts and 16/24/32 bit PCM .wav audio files.