All developer tools

Browse every planned DevToolbox utility from one typed registry. Filter by category or where processing happens.

Browse by category

Formatting & Validation

Format, validate, and inspect structured data.

5 tools

Encoding & Decoding

Translate data between common transport formats.

5 tools

Generators

Create identifiers, hashes, and safe sample data.

5 tools

Date & Time

Convert timestamps, dates, zones, and schedules.

5 tools

Comparison & Text

Compare, transform, and analyze text.

6 tools

DevOps & SRE

Inspect infrastructure configuration and operational data.

9 tools

Networking & Web

Understand addresses, URLs, headers, and web behavior.

6 tools

AI Engineering

Plan, validate, and debug production AI workflows.

4 tools

Popular tools

Frequently used utilities, ordered by product popularity.

JSON Formatter and Validator

Formatting & Validation

Format, validate, minify, and inspect JSON safely.

Processed locally in your browser

JWT Decoder and Inspector

Encoding & Decoding

Inspect JWT headers, claims, dates, and token structure.

Processed locally in your browser

Base64 Encoder and Decoder

Encoding & Decoding

Encode or decode UTF-8 text and local files.

Processed locally in your browser

Recently added

The newest entries added to the DevToolbox roadmap.

AI Tool-Calling and MCP Schema Builder

NEW

AI Engineering

Build and compare OpenAI, Anthropic, and MCP tool definitions.

Processed locally in your browser

LLM Token and Cost Calculator

NEW

AI Engineering

Estimate tokens, import reviewed model pricing, and compare workload costs.

Uses a secure server request

RAG Chunking Playground

NEW

AI Engineering

Compare document chunking strategies, overlap, offsets, and token estimates.

Processed locally in your browser

Tool directory

45 tools found

AI Tool-Calling and MCP Schema Builder

NEW

AI Engineering

Build and compare OpenAI, Anthropic, and MCP tool definitions.

Processed locally in your browser

Base64 Encoder and Decoder

Encoding & Decoding

Encode or decode UTF-8 text and local files.

Processed locally in your browser

Case Converter

NEW

Comparison & Text

Convert text between common programming case styles.

Processed locally in your browser

Certificate Expiry Checker

NEW

DevOps & SRE

Inspect a remote TLS certificate and its expiration window.

Uses a secure server request

Character, Word and Line Counter

NEW

Comparison & Text

Count characters, words, lines, and byte size.

Processed locally in your browser

CIDR and IP Calculator

NEW

DevOps & SRE

Calculate network ranges, masks, hosts, and address details.

Processed locally in your browser

Cron Expression Builder

Date & Time

Build, validate, and explain standard Unix cron expressions.

Processed locally in your browser

Date Difference Calculator

NEW

Date & Time

Calculate precise durations between two dates.

Processed locally in your browser

DNS Lookup

NEW

Networking & Web

Query common DNS record types for a hostname.

Uses a secure server request

Docker Compose Validator

NEW

DevOps & SRE

Inspect Compose files for structure and common mistakes.

Processed locally in your browser

Environment Variable Parser

DevOps & SRE

Parse, validate, sort, and convert environment variable files.

Processed locally in your browser

Fake Test Data Generator

NEW

Generators

Generate non-sensitive sample records for development.

Processed locally in your browser

Hash Generator

Generators

Create SHA hashes for local text and files using Web Crypto.

Processed locally in your browser

Hex, Binary, Decimal and ASCII Converter

NEW

Encoding & Decoding

Convert values between common numeric and text encodings.

Processed locally in your browser

HTML Entity Encoder and Decoder

NEW

Encoding & Decoding

Convert reserved characters to and from HTML entities.

Processed locally in your browser

HTTP Header Analyzer

NEW

Networking & Web

Inspect response headers and common security directives.

Uses a secure server request

HTTP Status Code Reference

NEW

DevOps & SRE

Search HTTP response codes and practical explanations.

Processed locally in your browser

ISO Date Formatter

NEW

Date & Time

Parse, normalize, and display ISO 8601 date values.

Processed locally in your browser

JSON Diff Checker

NEW

Comparison & Text

Compare parsed JSON values without key-order noise.

Processed locally in your browser

JSON Formatter and Validator

Formatting & Validation

Format, validate, minify, and inspect JSON safely.

Processed locally in your browser

JWT Decoder and Inspector

Encoding & Decoding

Inspect JWT headers, claims, dates, and token structure.

Processed locally in your browser

Kubernetes YAML Validator

NEW

DevOps & SRE

Validate Kubernetes manifests and common configuration issues.

Processed locally in your browser

LLM Token and Cost Calculator

NEW

AI Engineering

Estimate tokens, import reviewed model pricing, and compare workload costs.

Uses a secure server request

Log Formatter and Analyzer

NEW

DevOps & SRE

Format structured logs and summarize levels and patterns.

Processed locally in your browser

Lorem Ipsum Generator

NEW

Generators

Generate placeholder words, sentences, and paragraphs.

Processed locally in your browser

Markdown Previewer

NEW

Formatting & Validation

Preview Markdown with a synchronized rendered view.

Processed locally in your browser

Query String Builder

NEW

Networking & Web

Build and inspect encoded URL query parameters.

Processed locally in your browser

RAG Chunking Playground

NEW

AI Engineering

Compare document chunking strategies, overlap, offsets, and token estimates.

Processed locally in your browser

Random Password Generator

NEW

Generators

Create cryptographically secure passwords with custom rules.

Processed locally in your browser

Regular Expression Tester

NEW

Comparison & Text

Test JavaScript-compatible patterns and inspect matches.

Processed locally in your browser

Sensitive Data Masker

NEW

DevOps & SRE

Detect and redact common secrets and personal identifiers.

Processed locally in your browser

SQL Formatter

NEW

Formatting & Validation

Format SQL queries for clearer review and debugging.

Processed locally in your browser

Structured Output Schema Builder

NEW

AI Engineering

Build JSON Schema visually, validate samples, and export provider configurations.

Processed locally in your browser

Terraform Variable Generator

NEW

DevOps & SRE

Generate typed Terraform variable and tfvars blocks.

Processed locally in your browser

Text Diff Checker

Comparison & Text

Compare two text inputs with clear line-level changes.

Processed locally in your browser

Text Sorter and Deduplicator

NEW

Comparison & Text

Sort lines and remove duplicates with predictable options.

Processed locally in your browser

Time Zone Converter

NEW

Date & Time

Translate a date and time between named time zones.

Processed locally in your browser

Unix Timestamp Converter

Date & Time

Convert Unix timestamps and readable dates across zones.

Processed locally in your browser

URL Encoder and Decoder

NEW

Encoding & Decoding

Encode and decode URL components without a network request.

Processed locally in your browser

URL Parser

NEW

Networking & Web

Break a URL into protocol, host, path, and parameters.

Processed locally in your browser

User-Agent Parser

NEW

Networking & Web

Parse browser, operating system, and device information.

Processed locally in your browser

UUID Generator

Generators

Generate secure UUID v4 values individually or in batches.

Processed locally in your browser

Webhook Payload Tester

NEW

Networking & Web

Send sample payloads through a controlled test endpoint.

Uses a secure server request

XML Formatter and Validator

NEW

Formatting & Validation

Format XML documents and identify structural errors.

Processed locally in your browser

YAML Formatter, Validator and Converter

Formatting & Validation

Validate YAML and convert between YAML and JSON.

Processed locally in your browser

All developer tools

Browse every planned DevToolbox utility from one typed registry. Filter by category or where processing happens.

Browse by category

Formatting & Validation

Format, validate, and inspect structured data.

5 tools

Encoding & Decoding

Translate data between common transport formats.

5 tools

Generators

Create identifiers, hashes, and safe sample data.

5 tools

Date & Time

Convert timestamps, dates, zones, and schedules.

5 tools

Comparison & Text

Compare, transform, and analyze text.

6 tools

DevOps & SRE

Inspect infrastructure configuration and operational data.

9 tools

Networking & Web

Understand addresses, URLs, headers, and web behavior.

6 tools

AI Engineering

Plan, validate, and debug production AI workflows.

4 tools

Popular tools

Frequently used utilities, ordered by product popularity.

JSON Formatter and Validator

Formatting & Validation

Format, validate, minify, and inspect JSON safely.

Processed locally in your browser

JWT Decoder and Inspector

Encoding & Decoding

Inspect JWT headers, claims, dates, and token structure.

Processed locally in your browser

Base64 Encoder and Decoder

Encoding & Decoding

Encode or decode UTF-8 text and local files.

Processed locally in your browser

Recently added

The newest entries added to the DevToolbox roadmap.

AI Tool-Calling and MCP Schema Builder

NEW

AI Engineering

Build and compare OpenAI, Anthropic, and MCP tool definitions.

Processed locally in your browser

LLM Token and Cost Calculator

NEW

AI Engineering

Estimate tokens, import reviewed model pricing, and compare workload costs.

Uses a secure server request

RAG Chunking Playground

NEW

AI Engineering

Compare document chunking strategies, overlap, offsets, and token estimates.

Processed locally in your browser

Tool directory

45 tools found

AI Tool-Calling and MCP Schema Builder

NEW

AI Engineering

Build and compare OpenAI, Anthropic, and MCP tool definitions.

Processed locally in your browser

Base64 Encoder and Decoder

Encoding & Decoding

Encode or decode UTF-8 text and local files.

Processed locally in your browser

Case Converter

NEW

Comparison & Text

Convert text between common programming case styles.

Processed locally in your browser

Certificate Expiry Checker

NEW

DevOps & SRE

Inspect a remote TLS certificate and its expiration window.

Uses a secure server request

Character, Word and Line Counter

NEW

Comparison & Text

Count characters, words, lines, and byte size.

Processed locally in your browser

CIDR and IP Calculator

NEW

DevOps & SRE

Calculate network ranges, masks, hosts, and address details.

Processed locally in your browser

Cron Expression Builder

Date & Time

Build, validate, and explain standard Unix cron expressions.

Processed locally in your browser

Date Difference Calculator

NEW

Date & Time

Calculate precise durations between two dates.

Processed locally in your browser

DNS Lookup

NEW

Networking & Web

Query common DNS record types for a hostname.

Uses a secure server request

Docker Compose Validator

NEW

DevOps & SRE

Inspect Compose files for structure and common mistakes.

Processed locally in your browser

Environment Variable Parser

DevOps & SRE

Parse, validate, sort, and convert environment variable files.

Processed locally in your browser

Fake Test Data Generator

NEW

Generators

Generate non-sensitive sample records for development.

Processed locally in your browser

Hash Generator

Generators

Create SHA hashes for local text and files using Web Crypto.

Processed locally in your browser

Hex, Binary, Decimal and ASCII Converter

NEW

Encoding & Decoding

Convert values between common numeric and text encodings.

Processed locally in your browser

HTML Entity Encoder and Decoder

NEW

Encoding & Decoding

Convert reserved characters to and from HTML entities.

Processed locally in your browser

HTTP Header Analyzer

NEW

Networking & Web

Inspect response headers and common security directives.

Uses a secure server request

HTTP Status Code Reference

NEW

DevOps & SRE

Search HTTP response codes and practical explanations.

Processed locally in your browser

ISO Date Formatter

NEW

Date & Time

Parse, normalize, and display ISO 8601 date values.

Processed locally in your browser

JSON Diff Checker

NEW

Comparison & Text

Compare parsed JSON values without key-order noise.

Processed locally in your browser

JSON Formatter and Validator

Formatting & Validation

Format, validate, minify, and inspect JSON safely.

Processed locally in your browser

JWT Decoder and Inspector

Encoding & Decoding

Inspect JWT headers, claims, dates, and token structure.

Processed locally in your browser

Kubernetes YAML Validator

NEW

DevOps & SRE

Validate Kubernetes manifests and common configuration issues.

Processed locally in your browser

LLM Token and Cost Calculator

NEW

AI Engineering

Estimate tokens, import reviewed model pricing, and compare workload costs.

Uses a secure server request

Log Formatter and Analyzer

NEW

DevOps & SRE

Format structured logs and summarize levels and patterns.

Processed locally in your browser

Lorem Ipsum Generator

NEW

Generators

Generate placeholder words, sentences, and paragraphs.

Processed locally in your browser

Markdown Previewer

NEW

Formatting & Validation

Preview Markdown with a synchronized rendered view.

Processed locally in your browser

Query String Builder

NEW

Networking & Web

Build and inspect encoded URL query parameters.

Processed locally in your browser

RAG Chunking Playground

NEW

AI Engineering

Compare document chunking strategies, overlap, offsets, and token estimates.

Processed locally in your browser

Random Password Generator

NEW

Generators

Create cryptographically secure passwords with custom rules.

Processed locally in your browser

Regular Expression Tester

NEW

Comparison & Text

Test JavaScript-compatible patterns and inspect matches.

Processed locally in your browser

Sensitive Data Masker

NEW

DevOps & SRE

Detect and redact common secrets and personal identifiers.

Processed locally in your browser

SQL Formatter

NEW

Formatting & Validation

Format SQL queries for clearer review and debugging.

Processed locally in your browser

Structured Output Schema Builder

NEW

AI Engineering

Build JSON Schema visually, validate samples, and export provider configurations.

Processed locally in your browser

Terraform Variable Generator

NEW

DevOps & SRE

Generate typed Terraform variable and tfvars blocks.

Processed locally in your browser

Text Diff Checker

Comparison & Text

Compare two text inputs with clear line-level changes.

Processed locally in your browser

Text Sorter and Deduplicator

NEW

Comparison & Text

Sort lines and remove duplicates with predictable options.

Processed locally in your browser

Time Zone Converter

NEW

Date & Time

Translate a date and time between named time zones.

Processed locally in your browser

Unix Timestamp Converter

Date & Time

Convert Unix timestamps and readable dates across zones.

Processed locally in your browser

URL Encoder and Decoder

NEW

Encoding & Decoding

Encode and decode URL components without a network request.

Processed locally in your browser

URL Parser

NEW

Networking & Web

Break a URL into protocol, host, path, and parameters.

Processed locally in your browser

User-Agent Parser

NEW

Networking & Web

Parse browser, operating system, and device information.

Processed locally in your browser

UUID Generator

Generators

Generate secure UUID v4 values individually or in batches.

Processed locally in your browser

Webhook Payload Tester

NEW

Networking & Web

Send sample payloads through a controlled test endpoint.

Uses a secure server request

XML Formatter and Validator

NEW

Formatting & Validation

Format XML documents and identify structural errors.

Processed locally in your browser

YAML Formatter, Validator and Converter

Formatting & Validation

Validate YAML and convert between YAML and JSON.

Processed locally in your browser