# AGEX Signature Verifier Verify the Ed25519 signature attached to an AGEX bundle > Canonical page: https://elysiatools.com/en/tools/agex-signature-verifier - **Category:** Security - **Keywords:** agex, signature verifier, ed25519, bundle verification ## Overview This tool verifies whether an AGEX bundle signature is valid. It can use the embedded public key for convenience or a separately supplied public key when you want explicit trust control. ## Inputs - **Bundle File** (file) - **Signer Public Key** (textarea): Optional base64 Ed25519 public key. Leave blank to use the embedded public key. ## When to use - When you need to confirm that an AGEX bundle has not been tampered with and originates from a trusted sender. - When you want to verify the cryptographic signature of a bundle without decrypting its payload or entering a passphrase. - When you need to enforce explicit trust control by validating an AGEX bundle against a specific, externally provided Ed25519 public key. ## How it works - Upload the AGEX bundle file (up to 100MB) that contains the signature you want to verify. - Optionally, paste a base64-encoded Ed25519 public key into the signer public key field to enforce verification against a specific identity. - Click the verify button to run the cryptographic check on the bundle's Ed25519 signature. - Review the generated JSON output to confirm if the signature is present and successfully verified. ## Use cases - Verifying the integrity of received AGEX software packages or data bundles before deployment. - Auditing signed AGEX archives to ensure they match a known developer's public key. - Troubleshooting failed bundle imports by checking if the signature is present and cryptographically valid. ## Frequently asked questions ### Does this tool decrypt the contents of the AGEX bundle? No, this tool only verifies the cryptographic Ed25519 signature and does not decrypt the payload or require a decryption passphrase. ### What happens if I leave the Signer Public Key field blank? The tool will automatically attempt to verify the signature using the public key embedded within the AGEX bundle itself. ### What format should the external public key be in? The external signer public key must be provided as a base64-encoded Ed25519 public key. ### What file size limit applies to the AGEX bundle? You can upload AGEX bundle files up to 100MB in size for signature verification. ### How do I know if the signature verification succeeded? The output JSON will display a 'signatureVerification' status of 'verified' if the signature is valid. ## Related tools - [AGEX Secure Share Note](https://elysiatools.com/en/tools/agex-secure-share-note): Generate a plain-language share note for an AGEX bundle so recipients know how to decrypt and verify it safely - [AGEX Bundle Inspector](https://elysiatools.com/en/tools/agex-bundle-inspector): Inspect AGEX bundle metadata without decrypting the file contents - [AGEX Bundle Rewrapper](https://elysiatools.com/en/tools/agex-bundle-rewrapper): Re-encrypt an AGEX bundle with a new passphrase and fresh Argon2id/XChaCha parameters - [OCR PDF to Structured JSON Bridge](https://elysiatools.com/en/tools/ocr-pdf-to-structured-json-bridge): Extract the PDF text layer with geometry (lines by y-position, tables by column gaps, headings by font size, colon key-value pairs), then fill a user-supplied JSON Schema field by field — labels matched by normalized keys, values coerced to declared types and validated with ajv. - [AI ID Card OCR Recognition](https://elysiatools.com/en/tools/ai-ocr-id-card-to-json): Extract key information from ID card images and convert to JSON format using AI vision models for free - [Excel to JSON Converter](https://elysiatools.com/en/tools/excel-to-json): Convert Excel file to JSON format, extracting data from the first worksheet - [Audio to Text Transcriber (AI)](https://elysiatools.com/en/tools/audio-to-text-transcriber): Transcribe speech from audio (wav/mp3/m4a/flac/ogg/webm/aac) to text, SRT, VTT or JSON using the grok-stt AI model. Up to 10 minutes. - [AGEX Bundle Diff](https://elysiatools.com/en/tools/agex-bundle-diff): Compare two AGEX bundles and highlight metadata or protection-setting differences ## Samples - [Distributed Tracing Samples](https://elysiatools.com/en/samples/distributed-tracing-samples): Comprehensive distributed tracing examples using Jaeger, OpenTelemetry, and other modern observability tools for microservices architecture - [AWS EventBridge Samples](https://elysiatools.com/en/samples/eventbridge-samples): AWS EventBridge examples including event buses, rules, targets, schema registry, custom events, and cross-account event routing for serverless event-driven architecture - [JWT Samples](https://elysiatools.com/en/samples/jwt-samples): Comprehensive JWT examples from basic token structure to advanced security implementations - [PDF Samples](https://elysiatools.com/en/samples/pdf-samples): Generated PDF samples from tools dated 2026-02-01 to 2026-02-10 ## Related content - [AGEX Secure Package Review Before Handoff](https://elysiatools.com/en/hubs/agex-secure-package-review): Generate a test signing key, inspect AGEX bundle metadata, verify its signature with a trusted public key, and stop the handoff when evidence is incomplete. - [AGEX Secure File Packaging and Handoff](https://elysiatools.com/en/hubs/agex-secure-file-sharing): Package a file as AGEX, inspect visible metadata, choose passphrase and signature settings, and verify the handoff before delivery.