simpledevtools.org valid

Simple Dev Tools

Free, privacy-first developer utilities that run entirely in the browser. No signup, no ads, no server-side processing — input is never uploaded, logged, or stored. 45 tools across 9 categories.

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-25T11:36:40.892Z. Cached copy · Source on simpledevtools.org

# Simple Dev Tools

> Free, privacy-first developer utilities that run entirely in the browser. No signup, no ads, no server-side processing — input is never uploaded, logged, or stored. 45 tools across 9 categories.

For the complete inlined content of every tool (full descriptions + FAQs) in one file, see https://simpledevtools.org/llms-full.txt — useful for answering questions about any tool without further crawling.

## Security

- [JWT Decoder](https://simpledevtools.org/tools/jwt-decoder): Decode and inspect JWT tokens instantly.
- [Password Generator](https://simpledevtools.org/tools/password-generator): Generate strong, random passwords.
- [Certificate Decoder](https://simpledevtools.org/tools/certificate-decoder): Decode X.509 certificates into readable fields.
- [Hash Generator](https://simpledevtools.org/tools/hash-generator): Generate MD5, SHA-1, SHA-256, and SHA-512 hashes.
- [Bcrypt Hash Generator](https://simpledevtools.org/tools/bcrypt-generator): Generate and verify bcrypt password hashes.
- [HMAC Generator](https://simpledevtools.org/tools/hmac-generator): Generate HMAC signatures with SHA-256/SHA-512.
- [Password Strength Checker](https://simpledevtools.org/tools/password-entropy-checker): Estimate password strength and entropy.
- [PEM to DER Converter](https://simpledevtools.org/tools/pem-to-der): Convert PEM-encoded certificates to DER format.

## Encoding

- [Base64 Encoder/Decoder](https://simpledevtools.org/tools/base64): Encode or decode Base64 strings.
- [URL Encoder/Decoder](https://simpledevtools.org/tools/url-encoder): Encode or decode URL components.

## JSON

- [JSON Validator](https://simpledevtools.org/tools/json-validator): Validate JSON syntax and catch errors instantly.
- [JSON to CSV Converter](https://simpledevtools.org/tools/json-to-csv): Convert a JSON array into a CSV file.
- [CSV to JSON Converter](https://simpledevtools.org/tools/csv-to-json): Convert a CSV file into JSON.
- [JSON Diff Checker](https://simpledevtools.org/tools/json-diff): Compare two JSON documents and see what changed.
- [JSON Minifier](https://simpledevtools.org/tools/json-minifier): Minify JSON by stripping whitespace.

## Text

- [Regex Tester](https://simpledevtools.org/tools/regex-tester): Test and debug regular expressions live.
- [Text Diff Checker](https://simpledevtools.org/tools/text-diff): Compare two blocks of text and highlight differences.
- [Markdown to HTML Converter](https://simpledevtools.org/tools/markdown-to-html): Convert Markdown into clean HTML.
- [Case Converter](https://simpledevtools.org/tools/case-converter): Convert text between camelCase, snake_case, kebab-case, and more.
- [Word & Character Counter](https://simpledevtools.org/tools/word-counter): Count words, characters, and reading time instantly.
- [Slug Generator](https://simpledevtools.org/tools/slug-generator): Convert text into a clean, URL-safe slug.
- [HTML Entity Encoder/Decoder](https://simpledevtools.org/tools/html-entity-encoder): Encode or deco
…

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Machine-readable: GET /v1/resolve?q=simpledevtools.org · GET /v1/domain/simpledevtools.org · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for simpledevtools.org:
1. POST https://agentwebmap.com/v1/sites/simpledevtools.org/claims and keep claim_id and claim_secret private.
2. Publish the verification line "AgentWebMap verification: <token>" (token from step 1) in https://simpledevtools.org/llms.txt, or use the DNS, meta-tag or well-known method the response describes. This only verifies the listing; your website and domain remain yours.
3. POST https://agentwebmap.com/v1/sites/simpledevtools.org/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/simpledevtools.org).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

Corrections or removal requests: contact the directory.