DuckDuckGo Params
Result Settings
Region: kl =
  xa-ar for Arabia
  xa-en for Arabia (en)
  ar-es for Argentina
  au-en for Australia
  at-de for Austria
  be-fr for Belgium (fr)
  be-nl for Belgium (nl)
  br-pt for Brazil
  bg-bg for Bulgaria
  ca-en for Canada
  ca-fr for Canada (fr)
  ct-ca for Catalan
  cl-es for Chile
  cn-zh for China
  co-es for Colombia
  hr-hr for Croatia
  cz-cs for Czech Republic
  dk-da for Denmark
  ee-et for Estonia
  fi-fi for Finland
  fr-fr for France
  de-de for Germany
  gr-el for Greece
  hk-tzh for Hong Kong
  hu-hu for Hungary
  in-en for India
  id-id for Indonesia
  id-en for Indonesia (en)
  ie-en for Ireland
  il-he for Israel
  it-it for Italy
  jp-jp for Japan
  kr-kr for Korea
  lv-lv for Latvia
  lt-lt for Lithuania
  xl-es for Latin America
  my-ms for Malaysia
  my-en for Malaysia (en)
  mx-es for Mexico
  nl-nl for Netherlands
  nz-en for New Zealand
  no-no for Norway
  pe-es for Peru
  ph-en for Philippines
  ph-tl for Philippines (tl)
  pl-pl for Poland
  pt-pt for Portugal
  ro-ro for Romania
  ru-ru for Russia
  sg-en for Singapore
  sk-sk for Slovak Republic
  sl-sl for Slovenia
  za-en for South Africa
  es-es for Spain
  se-sv for Sweden
  ch-de for Switzerland (de)
  ch-fr for Switzerland (fr)
  ch-it for Switzerland (it)
  tw-tzh for Taiwan
  th-th for Thailand
  tr-tr for Turkey
  ua-uk for Ukraine
  uk-en for United Kingdom
  us-en for United States
  ue-es for United States (es)
  ve-es for Venezuela
  vn-vi for Vietnam
  wt-wt for No region
Safe Search: kp = 1 for On; kp = -1 for Moderate; kp = -2 for Off.
Open Instant Answers: kz = 1 for On; -1 for Off.
Auto-load Images: kc = 1 for On; -1 for Off.
Auto-load Results: kav = 1 for On; -1 for Off.
New Window: kn = 1 for On; -1 for Off.
Favicons: kf =
  1 for Just favicons
  w for Just WOT (trust) ratings
  fw for All WOT + favicons (both)
  -1 for Off
Full URLs: kaf = 1 for On; -1 for Off.
Auto-suggest: kac = 1 for On; -1 for Off.
Privacy Settings
Redirect: kd = 1 for On; -1 for Off.
HTTPS: kh =
  1 for On
  -1 for Off
Address bar: kg = g for GET; p for POST.
Video Playback: k5 =
  1 for Always play on DuckDuckGo
  2 for Open on third-party site
  -1 for Prompt me
Color Settings
Header: kj =
  r3 for Muted red (default)
  d for Light green
  g for Intense green
  g2 for Green
  b for Light blue
  b2 for Blue
  r for Intense red
  r2 for Red
  p for Purple
  o for Orange
  w for White
  or write out the color code you want, e.g. %23395323 (%23 is an encoded # char).
URLs: kx =
  r for Red (default)
  g for Green
  l for Black
  b for Blue
  p for Purple
  o for Orange
  e for Grey
  or write out the color code you want, e.g. %23395323 (%23 is an encoded # char).
Background: k7 =
  w for White (default)
  d for Light green
  g for Intense green
  g2 for Green
  b for Light blue
  b2 for Blue
  r for Intense red
  r2 for Red
  p for Purple
  o for Orange
  or write out the color code you want, e.g. %23395323 (%23 is an encoded # char).
Text: k8 =
  g for Grey (default)
  or write out the color code you want, e.g. %23395323 (%23 is an encoded # char).
Links: k9 =
  g for Dark Grey (default)
  b for Blue
  or write out the color code you want, e.g. %23395323 (%23 is an encoded # char).
Visited links: kaa =
  p for Grey with checkmark (default)
  p for Purple
  or write out the color code you want, e.g. %23395323 (%23 is an encoded # char).
Look & Feel Settings
Theme: kae =
  -1 for Default (default)
  c for Contrast
  r for Retro
  d for Dark
  t for Terminal
  or write out the color code you want, e.g. %23395323 (%23 is an encoded # char).
Size: ks =
  n for Large (default)
  l for Larger
  t for Largest
  m for Medium
  s for Small
Width: kw =
  n for Normal (default)
  w for Wide
  s for Super wide
Placement: km =
  m for Middle (default)
  l for Left
Link font: ka =
  a for Arial
  c for Century Gothic
  g for Georgia
  h for Helvetica
  p for Proxima Nova (default)
  n for Sans-serif
  e for Segoe UI
  s for Serif
  o for Tahoma
  t for Times
  b for Trebuchet MS
  v for Verdana
  or write out the font you want
Underline: ku =
  1 for On
  -1 for Off (default)
Text font: kt =
  a for Arial
  c for Century Gothic
  g for Georgia
  h for Helvetica
  p for Proxima Nova (default)
  n for Sans-serif
  e for Segoe UI
  s for Serif
  o for Tahoma
  t for Times
  b for Trebuchet MS
  v for Verdana
  or write out the font you want
Interface Settings
Header: ko =
  1 for On & floating
  s for On & scrolling (default)
  -1 for Off except for Instant Answer Menu (Please do not remove our header for anything other than individual use. See paragraph at the top for more details.)
  -2 for Off (Please do not remove our header for anything other than individual use. See paragraph at the top for more details.)
Advertisements: k1 =
  1 for On (default)
  -1 for Off
Page #s: kv =
  1 for On
  n for On but no numbers
  -1 for Off (default)
Units of Measure: kaj =
  m for Metric (Kilograms, Meters, Celsius)
  u for US based (Pounds, Feet, Fahrenheit)
  -1 for No Preference (default)
Source: t =
  A string to identify the source.
  See this help page for more info.
Directions Source: kam =
  apple-maps for Apple Maps
  bing-maps for Bing Maps
  google-maps for Google Maps
  here-maps for HERE Maps
  osm for OpenStreetMap