All 91 Developer Tools
Complete A–Z index of every free tool on DevDecode — across 9 categories. Most tools process input in your browser; live DNS and SSL checks use a server.
Browse by Category
Jump to Letter
A
B
- Base64 Encoder/Decoder — Encode and decode Base64 strings
- Base64 File Encoder — Encode files to Base64 and decode back
- Base64 Image Encoder — Convert images to Base64 data URIs
- Base64URL Encoder/Decoder — URL-safe Base64 encoding and decoding
- Bcrypt Generator — Generate and verify bcrypt password hashes
- Binary Encoder/Decoder — Convert between binary and text
- Binary to Decimal Converter — Convert binary numbers to decimal
- Binary to Hex Converter — Convert binary to hexadecimal
- Blowfish Encrypt/Decrypt — Encrypt and decrypt with Blowfish algorithm
C
- CER to PEM Converter — Convert CER files to PEM format
- Certificate Decoder — Inspect PEM certificates and certificate requests
- Certificate Key Matcher — Verify if a certificate and private key match
- CIDR Calculator — Calculate CIDR notation ranges and subnets
- Cookie Decoder — Parse and inspect HTTP cookie strings
- CRC32 Calculator — Calculate CRC32 checksums for data integrity
- Cron Expression Generator — Build and explain cron schedule expressions
- CRT to PEM Converter — Convert CRT files to PEM format
- CSR Decoder — Decode Certificate Signing Requests
- CSR Generator — Generate Certificate Signing Requests
D
- Decimal to Binary Converter — Convert decimal numbers to binary
- Decimal to Hex Converter — Convert decimal numbers to hexadecimal
- Decimal to Octal Converter — Convert decimal numbers to octal
- DER to PEM Converter — Convert DER-encoded files to PEM format
- DES Encrypt/Decrypt — Encrypt and decrypt text with DES algorithm
- Diff Checker — Compare two texts and highlight differences
- DNS Lookup — Look up DNS records for any domain
F
H
- Hex Encoder/Decoder — Convert between hexadecimal and text
- Hex to Binary Converter — Convert hexadecimal to binary
- Hex to Decimal Converter — Convert hexadecimal numbers to decimal
- Hex to IP Converter — Convert hexadecimal to IP addresses
- HMAC Generator — Generate HMAC authentication codes
- HMAC-SHA256 Generator — Generate HMAC-SHA256 authentication codes
- HTML Encoder/Decoder — Encode and decode HTML entities
- Htpasswd Generator — Generate Apache htpasswd entries
J
- JSON Diff Checker — Compare two JSON objects and find differences
- JSON Formatter — Format and beautify JSON data
- JSON Minifier — Validate and compact JSON data
- JSON to CSV Converter — Convert JSON arrays to CSV format
- JSON to Table Viewer — Display JSON data as an interactive table
- JSON to XML Converter — Convert JSON to XML format
- JSON to YAML Converter — Convert JSON to YAML format
- JSON Validator — Validate JSON syntax and structure
- JWT Decoder — Decode and inspect JSON Web Tokens
- JWT Encoder — Create and sign JSON Web Tokens
M
O
P
- Password Generator — Generate cryptographically secure passwords
- PEM Decoder — Decode PEM-encoded certificates, keys, and CSRs
- PEM to CRT Converter — Validate a PEM certificate and save it with a CRT filename
- PEM to PFX Converter — Convert PEM files to PFX/PKCS#12 format
- PFX to PEM Converter — Convert PFX/PKCS#12 files to PEM format
- PGP Encrypt/Decrypt — Encrypt and decrypt messages with PGP
- PGP Key Generator — Generate PGP public/private key pairs
- PKCE Generator — Generate PKCE code verifier and challenge pairs
R
S
- SAML Decoder — Decode and inspect SAML responses and assertions
- SAML Validator — Validate SAML response structure and conditions
- Self-Signed Cert Generator — Generate self-signed SSL certificates
- SHA-1 Hash Generator — Generate SHA-1 hashes from text or files
- SHA-256 Hash Generator — Generate SHA-256 hashes from text or files
- SHA-512 Hash Generator — Generate SHA-512 hashes from text or files
- Slug Generator — Generate URL-friendly slugs from text
- SSH Key Generator — Generate SSH public/private key pairs
- SSL Certificate Decoder — Decode and inspect SSL/TLS certificates
- SSL Checker — Check SSL certificate status for any domain
- SSL Converter — Convert between SSL certificate formats
- String Length Counter — Count characters, words, lines, and bytes
- Subnet Calculator — Calculate subnet masks, network ranges, and hosts