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Network & Developer Tools

Free online tools for network engineers, sysadmins, and developers. All tools run entirely in your browser — no data is sent to any server.

HomeNetwork & Developer Tools
Subnet CalculatorSNMP OID LookupPassword GeneratorJSON Formatter & ValidatorBase64 Encoder / DecoderJWT DecoderHash GeneratorCron Expression Parser

Subnet Calculator

Calculate network details from IP and CIDR

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SNMP OID Lookup

Search 41 common OIDs by name, OID, or description

SNMPv2-MIB

sysDescrDisplayString
1.3.6.1.2.1.1.1.0

System description — hardware type, OS version, networking software

sysObjectIDOBJECT IDENTIFIER
1.3.6.1.2.1.1.2.0

Vendor's authoritative identification OID

sysUpTimeTimeTicks
1.3.6.1.2.1.1.3.0

Time since SNMP agent was last re-initialized (in timeticks)

sysContactDisplayString
1.3.6.1.2.1.1.4.0

Contact person for this managed node

sysNameDisplayString
1.3.6.1.2.1.1.5.0

Administratively-assigned hostname

sysLocationDisplayString
1.3.6.1.2.1.1.6.0

Physical location of this node

sysServicesINTEGER
1.3.6.1.2.1.1.7.0

Set of services this entity primarily offers

snmpInPktsCounter32
1.3.6.1.2.1.11.1.0

Total SNMP messages received by the agent

snmpOutPktsCounter32
1.3.6.1.2.1.11.2.0

Total SNMP messages sent by the agent

IF-MIB

ifNumberINTEGER
1.3.6.1.2.1.2.1.0

Number of network interfaces present on this system

ifIndexInterfaceIndex
1.3.6.1.2.1.2.2.1.1

Unique value for each interface

ifDescrDisplayString
1.3.6.1.2.1.2.2.1.2

Interface name/description (e.g., GigabitEthernet0/1)

ifTypeIANAifType
1.3.6.1.2.1.2.2.1.3

Interface type (ethernet, loopback, tunnel, etc.)

ifSpeedGauge32
1.3.6.1.2.1.2.2.1.5

Interface speed in bits per second

ifPhysAddressPhysAddress
1.3.6.1.2.1.2.2.1.6

Interface MAC address

ifAdminStatusINTEGER
1.3.6.1.2.1.2.2.1.7

Admin status: up(1), down(2), testing(3)

ifOperStatusINTEGER
1.3.6.1.2.1.2.2.1.8

Operational status: up(1), down(2), testing(3)

ifInOctetsCounter32
1.3.6.1.2.1.2.2.1.10

Total bytes received on the interface

ifOutOctetsCounter32
1.3.6.1.2.1.2.2.1.16

Total bytes transmitted on the interface

ifInErrorsCounter32
1.3.6.1.2.1.2.2.1.14

Number of inbound packets with errors

ifOutErrorsCounter32
1.3.6.1.2.1.2.2.1.20

Number of outbound packets with errors

ifHCInOctetsCounter64
1.3.6.1.2.1.31.1.1.1.6

Total bytes received (64-bit counter for high-speed interfaces)

ifHCOutOctetsCounter64
1.3.6.1.2.1.31.1.1.1.10

Total bytes transmitted (64-bit counter for high-speed interfaces)

ifHighSpeedGauge32
1.3.6.1.2.1.31.1.1.1.15

Interface speed in Mbps (use instead of ifSpeed for >2Gbps)

ifNameDisplayString
1.3.6.1.2.1.31.1.1.1.1

Short interface name (e.g., Gi0/1)

ifAliasDisplayString
1.3.6.1.2.1.31.1.1.1.18

Interface alias/description set by admin

IP-MIB

ipAdEntAddrIpAddress
1.3.6.1.2.1.4.20.1.1

IP address for each interface

ipAdEntNetMaskIpAddress
1.3.6.1.2.1.4.20.1.3

Subnet mask for the IP address

TCP-MIB

tcpCurrEstabGauge32
1.3.6.1.2.1.6.9.0

Number of currently established TCP connections

HOST-RESOURCES-MIB

hrSystemUptimeTimeTicks
1.3.6.1.2.1.25.1.1.0

Time since last initialization of the host

hrMemorySizeKBytes
1.3.6.1.2.1.25.2.2.0

Amount of physical RAM in KB

hrProcessorLoadINTEGER
1.3.6.1.2.1.25.3.3.1.2

Average CPU load over the last minute (%)

hrStorageDescrDisplayString
1.3.6.1.2.1.25.2.3.1.3

Description of the storage area (disk name/mount point)

hrStorageSizeINTEGER
1.3.6.1.2.1.25.2.3.1.5

Total size of the storage area in allocation units

hrStorageUsedINTEGER
1.3.6.1.2.1.25.2.3.1.6

Used space on the storage area in allocation units

ENTITY-MIB

entPhysicalDescrDisplayString
1.3.6.1.2.1.47.1.1.1.1.2

Physical entity description (chassis, module, port)

entPhysicalNameDisplayString
1.3.6.1.2.1.47.1.1.1.1.7

Physical entity name

entPhysicalSerialNumDisplayString
1.3.6.1.2.1.47.1.1.1.1.11

Serial number of physical entity

CISCO-PROCESS-MIB

avgBusy5INTEGER
1.3.6.1.4.1.9.2.1.57.0

Cisco: 5-minute CPU busy percentage

CISCO-MEMORY-POOL-MIB

ciscoMemoryPoolUsedGauge32
1.3.6.1.4.1.9.9.48.1.1.1.5

Cisco: bytes of memory pool currently used

ciscoMemoryPoolFreeGauge32
1.3.6.1.4.1.9.9.48.1.1.1.6

Cisco: bytes of memory pool currently free

Showing 41 of 41 OIDs

Password Generator

Generate cryptographically secure passwords

StrengthWeak
Length16
664

JSON Formatter & Validator

Paste JSON to format, minify, or validate

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 to text

Text (0 chars) → Base64 (0 chars)

JWT Decoder

Decode and inspect JSON Web Tokens (no data sent to server)

Hash Generator

Generate SHA-256, SHA-512, SHA-384, and SHA-1 hashes

All hashing is done locally in your browser using the Web Crypto API

Cron Expression Parser

Parse and understand cron schedule expressions

0
Minute
0-59
9
Hour
0-23
*
Day of Month
1-31
*
Month
1-12
1-5
Day of Week
0-6 (Sun=0)

At 9:00 AM, on Monday through Friday

Next 5 Runs

3/9/2026, 9:00:00 AM
3/10/2026, 9:00:00 AM
3/11/2026, 9:00:00 AM
3/12/2026, 9:00:00 AM
3/13/2026, 9:00:00 AM

Quick Presets