Import Quality
Good
5 parsed rows · 0 warnings
Local MVP · Simulation-only · Not tax advice
See your crypto gains and losses — both sides, before tax season
Upload your exchange CSV and CoinTaxDelta shows where you earned, where you lost, and which losses may be worth reviewing — then exports clean files. Simulation-only, nothing leaves your browser.
22
CSV presets
0
Server-side storage
4
Export types
Included
Diagnostics
Lot Simulation
2 matches
FIFO placeholder transparency
Export Center
JSON + CSV
Full results and diagnostics
Parser Scope
Foundation
22 CSV presets
Transparent lot flow
Review matched BUY and SELL rows before exporting debug-friendly results.
Local-first MVP
Local-first, simulation-only workflow
CSV processing runs in this browser flow. This MVP does not upload your CSV to a CoinTaxDelta server, stores only lightweight recent-upload summaries in localStorage, and does not save full uploaded files.
Outputs are educational placeholders, not tax advice. Generic CSV is recommended; exchange presets are foundation-level examples.
View current support status
Check ready, foundation-level, and coming-soon features.
Product surface
Built for transparent crypto CSV review
CoinTaxDelta keeps the demo focused on import clarity, local simulation, and exportable diagnostics.
I
Import Quality Checks
Parser warnings, errors, and quality status make CSV problems visible before users trust any simulation output.
P
Parser Diagnostics
Download parser-only JSON diagnostics when malformed files cannot proceed to simulation.
T
Tax-Lot Simulation
FIFO-style placeholder matching shows how SELL rows connect back to available BUY lots.
P
Privacy-First Uploads
CSV files are read in the browser flow. The MVP stores only lightweight local summary history.
C
CSV and JSON Exports
Export full results, compact summaries, lot breakdowns, and parser diagnostics for review.
F
Foundation Exchange Parsers
Generic CSV is recommended, with 21 foundation-level exchange and platform presets for simple spot-like rows.
New to tax-loss harvesting?
Start with a plain-English guide
Learn the basic idea: you earned here, lost there, and the full picture matters. The guide explains possible loss candidates, exports, and limitations without legal jargon.
How it works
Three steps from CSV to export package
The flow is intentionally narrow and read-only for a local demo MVP.
1
Download a sample or upload CSV
Start with Generic CSV or one of the synthetic foundation-level exchange samples.
2
Review import quality
Check normalized transactions, warnings, parser errors, and the simulation-only rule preview.
3
Export the run
Download JSON, summary CSV, lot CSV, or diagnostics JSON depending on parser outcome.
MVP scope
Clear boundaries instead of production promises
This replaces sales claims with an honest view of what the MVP includes, what comes later, and what is intentionally unsupported.
Included now
- Generic CSV upload
- 22 CSV presets including foundation exchange and platform parsers
- Import quality report
- Lot breakdown transparency
- JSON, summary CSV, lot CSV, diagnostics exports
Coming later
- Deposits and withdrawals
- Conversions, staking, rewards
- Pricing integrations
- More real-world CSV variants
- Production tax report workflows
Not supported yet
- Legal-grade tax filing
- FX conversion
- Exchange account linking
- User accounts or database storage
- Payments or production claims
Simulation only
Simulation-only. Not tax advice.
- No trade execution
- No account linking
- No automatic filing
Your data stays local
CSV files are read in your browser. CoinTaxDelta does not connect to exchanges, wallets, or trading accounts, and it does not move funds.
- No exchange connection
- No wallet connection
- No trading or fund movement
Try it with sample data
Start with bundled sample data, review import quality, inspect lot matches, and export the result package.