ForHosting KIT
Everything you need.
One Kit.
Hundreds of ready-made tasks — PDF, images, audio, OCR, text AI, scraping, data and more — behind a single REST API. Send a job, get a finished result by webhook. No servers, no per-model tokens, a price you can read.
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7825ready-made tools
6channels
1API & key
$0.002per call, from
The full catalog
Search or filter by category. Every capability is its own endpoint with a published price.
⚙️ Developer UtilitiesFree
RGB565 color packer
convert 8-bit RGB to 16-bit color
F
POST /dev/rgb565-pack$0.002⚙️ Developer UtilitiesFree
Saturating integer add calculator
clamp sum at bit width
S
POST /dev/saturating-add$0.002⚙️ Developer UtilitiesFree
Fractional base converter
convert 0.xxx between bases 2–16
P
POST /dev/base-fraction-convert$0.002⚙️ Developer UtilitiesFree
CIDR usable hosts calculator
IPv4 total and usable addresses
K
POST /dev/cidr-host-count$0.002⚙️ Developer UtilitiesFree
CIDR prefix to subnet mask converter
mask, wildcard and address count
F
POST /dev/cidr-to-netmask$0.002⚙️ Developer UtilitiesFree
Integer parity checker
even or odd set-bit count
A
POST /dev/integer-parity$0.002⚙️ Developer UtilitiesFree
IPv4 address class calculator
class A B C D E from leading bits
S
POST /dev/ipv4-class$0.002⚙️ Developer UtilitiesFree
IPv4 to hexadecimal converter
binary by octet
B
POST /dev/ipv4-to-hex$0.002⚙️ Developer UtilitiesFree
LEB128 Varint Decoder
Decode Unsigned Byte Sequences
B
POST /dev/leb128-decode$0.002⚙️ Developer UtilitiesFree
Fast modular exponentiation calculator
base^exp mod m (BigInt)
S
POST /dev/modular-exponentiation$0.002⚙️ Developer UtilitiesFree
Prefix length to address count calculator
IPv4 and IPv6
K
POST /dev/cidr-count-addresses$0.002⚙️ Developer UtilitiesFree
IP range to CIDR calculator
minimal CIDR blocks from start–end
P
POST /dev/ip-range-to-cidr$0.002⚙️ Developer UtilitiesFree
IPv4-mapped IPv6 converter
mapped and compatible forms
S
POST /dev/ipv4-mapped-ipv6$0.002⚙️ Developer UtilitiesFree
IPv6 address expander
full eight-group form free
A
POST /dev/ipv6-expand$0.002⚙️ Developer UtilitiesFree
IPv6 prefix checker
test whether an address is in a CIDR range
B
POST /dev/ipv6-in-prefix$0.002⚙️ Developer UtilitiesFree
Next or previous IP address calculator
IPv4 rollover
F
POST /dev/next-ip$0.002⚙️ Developer UtilitiesFree
Complexity crossover point calculator
Big-O break-even n
P
POST /dev/big-o-crossover$0.002⚙️ Developer UtilitiesFree
Data rate unit converter
Mbps, MB/s, binary & decimal, free
S
POST /dev/data-rate-convert$0.002⚙️ Developer UtilitiesFree
IP address version detector
validate IPv4 and IPv6
F
POST /dev/ip-version-detect$0.002⚙️ Developer UtilitiesFree
Linear Search Average Comparisons Calculator
F
POST /dev/linear-search-avg$0.002⚙️ Developer UtilitiesFree
MAC address type analyzer
unicast, multicast, universal or local
K
POST /dev/mac-type$0.002⚙️ Developer UtilitiesFree
Merge Sort Comparisons Calculator
Worst and Average Cases
K
POST /dev/merge-sort-comparisons$0.002⚙️ Developer UtilitiesFree
TCP window size for throughput
BDP calculator for LFN
A
POST /dev/tcp-window-for-throughput$0.002⚙️ Developer UtilitiesFree
WiFi channel frequency calculator for 2.4 GHz and 5 GHz
B
POST /dev/wifi-channel-freq$0.002⚙️ Developer UtilitiesFree
Amdahl's Law Speedup Calculator
Find Parallel Scaling Limits
K
POST /dev/amdahl$0.002⚙️ Developer UtilitiesFree
Hash bits for collision resistance
birthday bound bit length
A
POST /dev/hash-bits-for-collision$0.002⚙️ Developer UtilitiesFree
Hash table load factor calculator
check resize threshold
B
POST /dev/hash-load-factor$0.002⚙️ Developer UtilitiesFree
Binary Heap Children Index Calculator
B
POST /dev/heap-children-index$0.002⚙️ Developer UtilitiesFree
Huffman code length calculator
optimal lengths and total bits
S
POST /dev/huffman-code-length$0.002⚙️ Developer UtilitiesFree
Recursion tree node count calculator
levels and work distribution
P
POST /dev/recursion-tree-nodes$0.002⚙️ Developer UtilitiesFree
Required operations per second calculator
meet a deadline
F
POST /dev/required-ops-per-second$0.002⚙️ Developer UtilitiesFree
Row-major array index calculator
offset and byte address
K
POST /dev/array-rowmajor-index$0.002⚙️ Developer UtilitiesFree
Balanced brackets validator
check bracket nesting and mismatches
K
POST /dev/balanced-brackets$0.002⚙️ Developer UtilitiesFree
Binary tree max nodes calculator
nodes and leaves by height
A
POST /dev/binary-tree-max-nodes$0.002⚙️ Developer UtilitiesFree
Code comment line counter
measure documentation density
F
POST /dev/count-comments$0.002⚙️ Developer UtilitiesFree
Edge list to adjacency matrix converter
F
POST /dev/edges-to-adjacency-matrix$0.002⚙️ Developer UtilitiesFree
Graph vertex degree calculator
in-degree, out-degree & handshake lemma
P
POST /dev/graph-degree$0.002⚙️ Developer UtilitiesFree
English word pluralizer
regular and irregular noun plurals
S
POST /dev/pluralize-word$0.002⚙️ Developer UtilitiesFree
Struct field offset calculator
C offsetof, size, and padding
S
POST /dev/struct-field-offset$0.002⚙️ Developer UtilitiesFree
Tabs to spaces converter
expand tab indentation to spaces, free
A
POST /dev/tabs-to-spaces$0.002⚙️ Developer UtilitiesFree
Sørensen–Dice string similarity calculator
bigram coefficient free online
S
POST /dev/dice-coefficient$0.002⚙️ Developer UtilitiesFree
Levenshtein Edit Distance Calculator for Two Strings
K
POST /dev/levenshtein$0.002⚙️ Developer UtilitiesFree
Longest common subsequence calculator
LCS length and one instance
P
POST /dev/longest-common-subsequence$0.002⚙️ Developer UtilitiesFree
Requests per second to daily converter for traffic planning
F
POST /dev/qps-to-daily$0.002⚙️ Developer UtilitiesFree
Repeated substring pattern detector
smallest unit and count
A
POST /dev/repeated-substring$0.002⚙️ Developer UtilitiesFree
Servers needed for load calculator
capacity with safety headroom
B
POST /dev/servers-needed$0.002⚙️ Developer UtilitiesFree
Batch throughput calculator
batch size, interval and target rate
F
POST /dev/batch-throughput$0.002⚙️ Developer UtilitiesFree
RAID capacity calculator
usable space, FT & overhead
S
POST /dev/raid-capacity$0.002⚙️ Developer UtilitiesFree
SemVer range satisfies checker
test package versions
B
POST /dev/semver-satisfies$0.002⚙️ Developer UtilitiesFree
Token bucket rate limit calculator
burst allow/deny, refill & wait time
P
POST /dev/token-bucket$0.002⚙️ Developer UtilitiesFree
ANSI truecolor generator
convert HEX or RGB to 24-bit terminal color
B
POST /dev/ansi-truecolor$0.002⚙️ Developer UtilitiesFree
MIME Type to File Extension Lookup
F
POST /dev/extension-from-mime$0.002⚙️ Developer UtilitiesFree
Glob pattern to regex converter
shell wildcards to regular expression
S
POST /dev/glob-to-regex$0.002⚙️ Developer UtilitiesFree
Key Length to Keyspace Calculator
Compare 56, 128, and 256 Bits
K
POST /dev/key-space-bits$0.002⚙️ Developer UtilitiesFree
Query String to JSON Converter
Decode URL Parameters
K
POST /dev/query-string-to-json$0.002⚙️ Developer UtilitiesFree
Rendezvous hashing node selector
highest-random-weight pick for a key
A
POST /dev/rendezvous-hash$0.002⚙️ Developer UtilitiesFree
Screen resolution pixel calculator
megapixels & framebuffer memory
P
POST /dev/screen-pixels$0.002⚙️ Developer UtilitiesFree
SI vs IEC byte converter
manufacturer GB vs OS GiB
A
POST /dev/si-vs-iec-bytes$0.002⚙️ Developer UtilitiesFree
Umask calculator
default file and directory permissions from umask
P
POST /dev/umask-calculator$0.002⚙️ Developer UtilitiesFree
UUID format validator
check version, variant and canonical form
F
POST /dev/uuid-validate$0.002No capabilities match your search.
How it works
1
Get your key
Create an account with your email and add balance when you need it. No subscription, no sales call.
2
Call the endpoint
One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.
3
Collect the result
Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.
Pay only for what you use
No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.
Free tools
$0.00
On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.
Pay-as-you-go
Per task
$0.002+
The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.
Balance
$10.00+
Top up your balance and spend it across web, API and the app. It never expires.