Forge is the suite of free dev tools.
JSON inspector, JWKS viewer, MCP config generator, .env template, token counter, freelance rate, and more. Every tool runs entirely in your browser. No server. No telemetry. No signup. Open-source where applicable. Open DevTools and verify zero outbound calls.
For developers.
JWT decoding, MCP config, pgvector queries, signature verification, token counting, webhook debugging, secret templates, cron, hashing, base64, UUID, JSON, and Claude Code helpers. Every tool runs in your browser — DevTools will show zero outbound requests.
JWT Inspector
Decode any JWT, see every claim, never leave the browser. Verify signatures with WebCrypto. Built explicitly because jwt.io sends your token to their server.
↗JWKS Viewer
Decode any JWKS endpoint or pasted JSON. Renders kid, alg, use, key length, x5c chain. Browser-side only.
↗MCP Config Generator
Build claude_desktop_config.json from a form. Filesystem, GitHub, Postgres presets one click. No JSON editing by hand.
Token Counter
Count tokens for Claude, GPT-4, and Gemini before you spend on them. Cost estimates per model with editable rates.
↗pgvector Query Builder
Generate similarity-search SQL for cosine, L2, and inner-product distance metrics. IVFFlat / HNSW DDL included.
↗Ed25519 Signature Verifier
Paste message, public key, signature. Auto-detects PEM, JWK, hex, base64. Strictly verify-only — no key generation.
↗Webhook Payload Inspector
Diff two webhook payloads, verify HMAC signatures (Stripe, GitHub, Slack). Debug raw bytes that look identical to humans.
↗.env Template Generator
Sanitize a .env into a shareable template. Outputs docker-compose env_file plus GitHub Actions secrets list.
Cron Expression Builder
Type a cron, get plain-English plus the next 10 actual fire times in your local timezone. Validates 5-field syntax, lists/ranges/steps.
↗JSON Formatter (no adware)
Format, validate, minify, sort-keys any JSON in your browser. The popular Chrome extension was reported to inject ads + track URLs after an auto-update. This one runs in this tab and does not.
↗UUID Generator (v4 / v7)
Generate v4 random or v7 timestamp-ordered UUIDs in bulk. Validate any UUID + decode version, variant, and embedded timestamp.
↗Hash Generator (MD5 / SHA family)
MD5, SHA-1, SHA-256, SHA-384, SHA-512 of any text or file. WebCrypto for SHA, RFC 1321 for MD5. Files read into memory and never uploaded.
↗Base64 Encoder / Decoder
Encode/decode any text or file as base64, base64url, or URL-encoded. Roundtrip verification, paste from clipboard, drag-drop files.
↗Git Repo Audit
Paste a public repo URL, get a quick read on commit cadence, contributor concentration, and obvious red flags before you depend on it.
↗CLAUDE.md Analyzer
Drop your CLAUDE.md, get a structural read — section coverage, contradiction flags, token weight, doctrine gaps. Browser-side only.
Forge Pro — coming soon.
Pay-once unlock for Pro features across the Forge suite. $9 lifetime. No subscription. No account. We'll list exact Pro features here once they're locked. Open-source where applicable; commercial-friendly where it isn't.
Need more than a free tool? Septim ships pay-once developer products, a 48-hour product audit, and custom SMB software builds. No subscriptions, ever. — Something broken? Get help →