Local calculation
01 / Cost estimatetoken cost estimator
Enter usage and prices to calculate single and batch costs, see the breakdown and export the details.
- Exact decimals
- Cost breakdown
- CSV export
No sign-in · No automatic model calls
Tools for working with AI AI UTILITIES
Format JSON, convert account files, estimate costs and check API connections—all in your browser.
- Available tools
- 4 tools
- Local tools
- 3 tools
- Direct connection
- 1 tool
Estimates text token costs only. Excludes caching, tiers, free allowances, discounts, taxes, subscriptions, images, audio and video. Prices you enter are not quotes from us or a provider.
LOCAL WORKSPACE
Open in its own pageJSON formatting and redaction
Validate, format and compact JSON, preserve large number literals, and mask common credential fields before copying or downloading.
Your JSON stays in this tab. It is never uploaded, saved in browser storage or added to the URL. Large numbers and their original notation are preserved. Comments, trailing commas and duplicate keys are not supported.
Run the formatter again after editing. Maximum size: 256 KiB. Maximum nesting: 64 levels.
LOCAL WORKSPACE
Open in its own pageProxy account format converter
Identify account JSON in bulk, check duplicates and expiry, convert to seven output formats and download a ZIP.
Converts in page memory without uploading or saving input, signing in or refreshing tokens. API key sign-in can only be exported in the original Codex format.
Copies and downloads contain full credentials. The preview masks tokens by default. Back up your configuration and check the provider, account and expiry before importing.
1. Import account JSON
2. Review and export
Identify again after changing inputs. No network requests or account verification have been performed.
Supported formats and import notes
OpenAI OAuth supports all seven output formats. Claude, Gemini and Antigravity map only OAuth credential fields for CPA / Sub2API. API key accounts retain the Codex sign-in format only. Converts supplied account information without obtaining new tokens or inferring plans or available credit.
Sub2API and 9router produce batch JSON. CPA, Cockpit, Codex, AxonHub and Codex-Manager export separate account files, which can be packed into a ZIP. Target versions and import requirements may change; check one account first. Successful conversion does not verify sign-in, permissions or model calls.
Import single-account authentication files individually. Codex Auth JSON is not an account list; do not overwrite auth.json with the overview array. Unknown or expired timestamps retain their status. Export time is not account refresh time.
Device, proxy and existing client settings are not migrated. Clear all removes inputs and results from page memory. Manage any copied or downloaded files yourself.
Checks one text response for the selected protocol, without verifying model identity, balance or long-term reliability. OpenAI Chat uses max_completion_tokens, Responses uses max_output_tokens, Anthropic uses max_tokens and Gemini uses maxOutputtokens. Unsupported parameters retain the actual error; no automatic protocol fallback or retry. Reception is limited to 128 KiB. Changing or leaving the page does not revoke a request already received by the server.
UTILITY LIBRARY
All 4 tools · No sign-inTools for everyday troubleshooting
Use a tool here or open it in its own page.
Local calculation
02 / JSON formattingJSON formatting and redaction
Validate, format and compact JSON, preserve large number literals, and mask common credential fields before copying or downloading.
- Syntax checks
- Credential masking
- Preserves large numbers
Local calculation
03 / Account conversionProxy account format converter
Identify account JSON in bulk, check duplicates and expiry, convert to seven output formats and download a ZIP.
- Multiple files
- 7 output formats
- ZIP export
Direct request
04 / Connection testAPI connectivity tester
Send one request directly from your browser using one of four protocols, then inspect HTTP status, duration and usage reported by the API.
- 4 protocols
- User-initiated request
- May incur charges
PRIVACY & CONTROL
Try the examples without real credentialsYour data, your control
Local processing and direct requests
Formatting, account conversion and cost calculations run on this page. API tests send your Key and prompt directly to the selected endpoint only after you click, without passing through our server.
Keep control of sensitive data
Tools do not put your input in URLs or browser storage. Account previews mask tokens by default. Copied and downloaded exports contain full credentials; keep them secure.
Understand what the results mean
Redaction uses common field names; review the output before exporting. Cost estimates use the prices you enter. Account conversion does not verify sign-in or API availability.