diff --git a/backend/src/api-tests/crossSearch/export.test.ts b/backend/src/api-tests/crossSearch/export.test.ts
index c5a60d4c..1ef773b5 100644
--- a/backend/src/api-tests/crossSearch/export.test.ts
+++ b/backend/src/api-tests/crossSearch/export.test.ts
@@ -16,6 +16,12 @@ describe('Getting cross-search export', () => {
     expect(response.body).toEqual({ error: 'ColumnFilters is not an array.' })
   })
 
+  it('with invalid POST column filters type does not work', async () => {
+    const response = await send(`crosssearch/export`, 'POST', { columnFilters: '"not an array"', sorting: [] })
+    expect(response.status).toEqual(403)
+    expect(response.body).toEqual({ error: 'ColumnFilters is not an array.' })
+  })
+
   it('with invalid column filters content does not work', async () => {
     const { body: responseBody1, status: responseStatus1 } = await send(
       `crosssearch/export/[{"id": "not_a_column", "value": "Dmanisi"}]/[]`,
diff --git a/backend/src/api-tests/crossSearch/get.test.ts b/backend/src/api-tests/crossSearch/get.test.ts
index 098c0dfa..0003438c 100644
--- a/backend/src/api-tests/crossSearch/get.test.ts
+++ b/backend/src/api-tests/crossSearch/get.test.ts
@@ -62,6 +62,19 @@ describe('Getting cross-search data', () => {
       expect(response2.body.length).toEqual(10)
     })
 
+    it('Requesting get all with POST body has correct data', async () => {
+      const { body, status } = await send<CrossSearch[]>(`crosssearch/all`, 'POST', {
+        limit: 20,
+        offset: 0,
+        columnFilters: [{ id: 'country', value: 'Spain' }],
+        sorting: [{ id: 'loc_name', desc: false }],
+      })
+
+      expect(status).toEqual(200)
+      expect(body).toHaveLength(10)
+      expect(body.every(row => row.country === 'Spain')).toBe(true)
+    })
+
     it('Requesting get all with column filters has correct data', async () => {
       const { body: responseBody1, status: responseStatus1 } = await send<CrossSearch[]>(
         `crosssearch/all/20/0/[{"id": "lid_now_loc", "value": "21050"}]/[]`,
@@ -132,6 +145,18 @@ describe('Getting cross-search data', () => {
       expect(lastCountries).toEqual(['Japan', 'Japan', 'Japan', 'Japan', 'Japan'])
     })
 
+    it('Requesting localities with POST body has correct data', async () => {
+      const legacyResponse = await send(`crosssearch/localities/[{"id": "country", "value": "Spain"}]/[]`, 'GET')
+      const { body, status } = await send(`crosssearch/localities`, 'POST', {
+        columnFilters: [{ id: 'country', value: 'Spain' }],
+        sorting: [],
+      })
+
+      expect(status).toEqual(200)
+      expect(body.length).toBeGreaterThan(0)
+      expect(body).toEqual(legacyResponse.body)
+    })
+
     it('Requesting get all with column filtering does not allow invalid arrays or column names', async () => {
       const { body: responseBody1, status: responseStatus1 } = await send<CrossSearch[]>(
         `crosssearch/all/20/0/[{"id": "invalid_column", "value": "21050"}]/[]`,
diff --git a/backend/src/routes/crossSearch.ts b/backend/src/routes/crossSearch.ts
index 2fd771f2..c5a2917c 100644
--- a/backend/src/routes/crossSearch.ts
+++ b/backend/src/routes/crossSearch.ts
@@ -1,8 +1,9 @@
-import { Router } from 'express'
+import { Request, Response, Router } from 'express'
 import {
   getCrossSearchRawSql,
   getCrossSearchLocalitiesRawSql,
   parseAndValidateCrossSearchRouteParameters,
+  CrossSearchRequestParameters,
 } from '../services/crossSearch'
 import { fixBigInt } from '../utils/common'
 import { format, FormatterRow, FormatterRowTransformFunction } from 'fast-csv'
@@ -32,82 +33,101 @@ const transformFunction = (row: CrossSearch & { full_count?: number }) => {
   return transformedRow
 }
 
-router.get(`/all/:limit/:offset/:columnfilters/:sorting`, async (req, res) => {
-  let validatedValues
+const getValidatedValues = (parameters: CrossSearchRequestParameters) => {
+  const { validationErrors, ...values } = parseAndValidateCrossSearchRouteParameters(parameters)
+  const validatedValues = values
+  if (validationErrors.length > 0) {
+    return { validationErrors }
+  }
+  return { validatedValues }
+}
+
+const handleCrossSearchValidationError = (error: unknown, res: Response) => {
+  if (error instanceof Error) return res.status(403).send({ error: error.message })
+  return res.status(403).send('Unknown error')
+}
+
+const sendCrossSearchRows = async (req: Request, res: Response, parameters: CrossSearchRequestParameters) => {
+  let parsedValues
   try {
-    const { validationErrors, ...values } = parseAndValidateCrossSearchRouteParameters({
-      limit: req.params.limit,
-      offset: req.params.offset,
-      columnFilters: req.params.columnfilters,
-      sorting: req.params.sorting,
-    })
-    validatedValues = values
-    if (validationErrors.length > 0) {
-      return res.status(403).send(validationErrors)
-    }
+    parsedValues = getValidatedValues(parameters)
   } catch (error) {
-    if (error instanceof Error) return res.status(403).send({ error: error.message })
-    return res.status(403).send('Unknown error')
+    return handleCrossSearchValidationError(error, res)
+  }
+  if ('validationErrors' in parsedValues) {
+    return res.status(403).send(parsedValues.validationErrors)
   }
 
   try {
     const result = await getCrossSearchRawSql(
       req.user,
-      validatedValues.validatedLimit,
-      validatedValues.validatedOffset,
-      validatedValues.validatedColumnFilters,
-      validatedValues.validatedSorting
+      parsedValues.validatedValues.validatedLimit,
+      parsedValues.validatedValues.validatedOffset,
+      parsedValues.validatedValues.validatedColumnFilters,
+      parsedValues.validatedValues.validatedSorting
     )
     return res.status(200).send(fixBigInt(result))
   } catch (error) {
-    if (error instanceof Error) return res.status(403).send({ error: error.message })
-    return res.status(403).send('Unknown error')
+    return handleCrossSearchValidationError(error, res)
   }
-})
+}
 
-router.get(`/localities/:columnfilters/:sorting`, async (req, res) => {
-  let validatedValues
+const sendCrossSearchLocalities = async (req: Request, res: Response, parameters: CrossSearchRequestParameters) => {
+  let parsedValues
   try {
-    const { validationErrors, ...values } = parseAndValidateCrossSearchRouteParameters({
-      columnFilters: req.params.columnfilters,
-      sorting: req.params.sorting,
-    })
-    validatedValues = values
-    if (validationErrors.length > 0) {
-      return res.status(403).send(validationErrors)
-    }
+    parsedValues = getValidatedValues(parameters)
   } catch (error) {
-    if (error instanceof Error) return res.status(403).send({ error: error.message })
-    return res.status(403).send('Unknown error')
+    return handleCrossSearchValidationError(error, res)
+  }
+  if ('validationErrors' in parsedValues) {
+    return res.status(403).send(parsedValues.validationErrors)
   }
 
   try {
     const result = await getCrossSearchLocalitiesRawSql(
       req.user,
-      validatedValues.validatedColumnFilters,
-      validatedValues.validatedSorting
+      parsedValues.validatedValues.validatedColumnFilters,
+      parsedValues.validatedValues.validatedSorting
     )
     return res.status(200).send(fixBigInt(result))
   } catch (error) {
-    if (error instanceof Error) return res.status(403).send({ error: error.message })
-    return res.status(403).send('Unknown error')
+    return handleCrossSearchValidationError(error, res)
   }
+}
+
+router.post(`/all`, async (req, res) => {
+  return sendCrossSearchRows(req, res, req.body as CrossSearchRequestParameters)
 })
 
-router.get(`/export/:columnfilters/:sorting`, async (req, res) => {
-  let validatedValues
+router.get(`/all/:limit/:offset/:columnfilters/:sorting`, async (req, res) => {
+  return sendCrossSearchRows(req, res, {
+    limit: req.params.limit,
+    offset: req.params.offset,
+    columnFilters: req.params.columnfilters,
+    sorting: req.params.sorting,
+  })
+})
+
+router.post(`/localities`, async (req, res) => {
+  return sendCrossSearchLocalities(req, res, req.body as CrossSearchRequestParameters)
+})
+
+router.get(`/localities/:columnfilters/:sorting`, async (req, res) => {
+  return sendCrossSearchLocalities(req, res, {
+    columnFilters: req.params.columnfilters,
+    sorting: req.params.sorting,
+  })
+})
+
+const streamCrossSearchExport = async (req: Request, res: Response, parameters: CrossSearchRequestParameters) => {
+  let parsedValues
   try {
-    const { validationErrors, ...values } = parseAndValidateCrossSearchRouteParameters({
-      columnFilters: req.params.columnfilters,
-      sorting: req.params.sorting,
-    })
-    validatedValues = values
-    if (validationErrors.length > 0) {
-      return res.status(403).send(validationErrors)
-    }
+    parsedValues = getValidatedValues(parameters)
   } catch (error) {
-    if (error instanceof Error) return res.status(403).send({ error: error.message })
-    return res.status(403).send('Unknown error')
+    return handleCrossSearchValidationError(error, res)
+  }
+  if ('validationErrors' in parsedValues) {
+    return res.status(403).send(parsedValues.validationErrors)
   }
 
   let dataArray: Partial<CrossSearch[][]>
@@ -116,12 +136,11 @@ router.get(`/export/:columnfilters/:sorting`, async (req, res) => {
       req.user,
       undefined,
       undefined,
-      validatedValues.validatedColumnFilters,
-      validatedValues.validatedSorting
+      parsedValues.validatedValues.validatedColumnFilters,
+      parsedValues.validatedValues.validatedSorting
     )) as Partial<CrossSearch[][]>
   } catch (error) {
-    if (error instanceof Error) return res.status(403).send({ error: error.message })
-    return res.status(403).send('Unknown error')
+    return handleCrossSearchValidationError(error, res)
   }
 
   res.on('finish', () => {
@@ -163,6 +182,17 @@ router.get(`/export/:columnfilters/:sorting`, async (req, res) => {
   }
 
   return stream.end()
+}
+
+router.post(`/export`, async (req, res) => {
+  return streamCrossSearchExport(req, res, req.body as CrossSearchRequestParameters)
+})
+
+router.get(`/export/:columnfilters/:sorting`, async (req, res) => {
+  return streamCrossSearchExport(req, res, {
+    columnFilters: req.params.columnfilters,
+    sorting: req.params.sorting,
+  })
 })
 
 export default router
diff --git a/backend/src/services/crossSearch.ts b/backend/src/services/crossSearch.ts
index 00955d76..2dbdb680 100644
--- a/backend/src/services/crossSearch.ts
+++ b/backend/src/services/crossSearch.ts
@@ -13,6 +13,13 @@ import { generateCrossSearchLocalitiesSql, generateCrossSearchSql } from './quer
 import { ValidationObject } from '../../../frontend/src/shared/validators/validator'
 import { validateCrossSearchRouteParams } from '../../../frontend/src/shared/validators/crossSearch'
 
+export type CrossSearchRequestParameters = {
+  limit?: string | number
+  offset?: string | number
+  columnFilters: unknown
+  sorting: unknown
+}
+
 const getAllowedLocalities = async (user: User) => {
   const usersProjects = await nowDb.now_proj_people.findMany({
     where: { initials: user.initials },
@@ -195,22 +202,27 @@ export const getCrossSearchLocalitiesRawSql = async (
   return result
 }
 
-export const parseAndValidateCrossSearchRouteParameters = (parameters: CrossSearchRouteParameters) => {
+const parseOptionalNumber = (value: string | number | undefined, name: string) => {
+  if (value === undefined) return undefined
+  const parsedValue = typeof value === 'number' ? value : parseInt(value)
+  if (isNaN(parsedValue)) throw new Error(`${name} is not a number.`)
+  return parsedValue
+}
+
+const parseArrayParameter = (value: unknown, name: string) => {
+  const parsedValue: unknown = typeof value === 'string' ? (JSON.parse(value) as unknown) : value
+  if (!Array.isArray(parsedValue)) throw new Error(`${name} is not an array.`)
+  return parsedValue as unknown[]
+}
+
+export const parseAndValidateCrossSearchRouteParameters = (
+  parameters: CrossSearchRouteParameters | CrossSearchRequestParameters
+) => {
   const { limit, offset, columnFilters, sorting } = parameters
-  let parsedLimit
-  let parsedOffset
-  if (limit) {
-    parsedLimit = parseInt(limit)
-    if (isNaN(parsedLimit)) throw new Error('Limit is not a number.')
-  }
-  if (offset) {
-    parsedOffset = parseInt(offset)
-    if (isNaN(parsedOffset)) throw new Error('Offset is not a number.')
-  }
-  const parsedColumnFilters = JSON.parse(columnFilters) as unknown
-  if (!Array.isArray(parsedColumnFilters)) throw new Error('ColumnFilters is not an array.')
-  const parsedSorting = JSON.parse(sorting) as unknown
-  if (!Array.isArray(parsedSorting)) throw new Error('Sorting is not an array.')
+  const parsedLimit = parseOptionalNumber(limit, 'Limit')
+  const parsedOffset = parseOptionalNumber(offset, 'Offset')
+  const parsedColumnFilters = parseArrayParameter(columnFilters, 'ColumnFilters')
+  const parsedSorting = parseArrayParameter(sorting, 'Sorting')
 
   const parsedParameters = {
     limit: parsedLimit,
diff --git a/frontend/src/components/CrossSearch/CrossSearchExportMenuItem.tsx b/frontend/src/components/CrossSearch/CrossSearchExportMenuItem.tsx
index dd014cad..b2d10e43 100644
--- a/frontend/src/components/CrossSearch/CrossSearchExportMenuItem.tsx
+++ b/frontend/src/components/CrossSearch/CrossSearchExportMenuItem.tsx
@@ -19,14 +19,20 @@ export const CrossSearchExportMenuItem = ({ handleClose }: { handleClose: () =>
 
   const fetchCSVFile = async () => {
     setLoading(true)
-    const URIColumnFilters = encodeURIComponent(JSON.stringify(sqlColumnFilters))
-    const URIOrderBy = encodeURIComponent(JSON.stringify(sqlOrderBy))
 
     try {
       await downloadExportFileWithProgress({
-        url: `${BACKEND_URL}/crosssearch/export/${URIColumnFilters}/${URIOrderBy}`,
+        url: `${BACKEND_URL}/crosssearch/export`,
         filename,
-        fetchOptions,
+        fetchOptions: {
+          ...fetchOptions,
+          method: 'POST',
+          headers: {
+            ...fetchOptions.headers,
+            'Content-Type': 'application/json',
+          },
+          body: JSON.stringify({ columnFilters: sqlColumnFilters, sorting: sqlOrderBy }),
+        },
         notify,
         setNotificationMessage,
         startMessage: 'Generating cross-search CSV export...',
diff --git a/frontend/src/redux/crossSearchReducer.ts b/frontend/src/redux/crossSearchReducer.ts
index e6e6edfd..21cfba55 100755
--- a/frontend/src/redux/crossSearchReducer.ts
+++ b/frontend/src/redux/crossSearchReducer.ts
@@ -9,7 +9,9 @@ const crossSearchApi = api.injectEndpoints({
       { limit: number; offset: number; columnFilters: MRT_ColumnFiltersState; sorting: MRT_SortingState }
     >({
       query: ({ limit, offset, columnFilters, sorting }) => ({
-        url: `/crosssearch/all/${limit}/${offset}/${JSON.stringify(columnFilters)}/${JSON.stringify(sorting)}`,
+        url: `/crosssearch/all`,
+        method: 'POST',
+        body: { limit, offset, columnFilters, sorting },
       }),
       providesTags: result => (result ? [{ type: 'localities' }] : []),
     }),
@@ -18,7 +20,9 @@ const crossSearchApi = api.injectEndpoints({
       { columnFilters: MRT_ColumnFiltersState; sorting: MRT_SortingState }
     >({
       query: ({ columnFilters, sorting }) => ({
-        url: `/crosssearch/localities/${JSON.stringify(columnFilters)}/${JSON.stringify(sorting)}`,
+        url: `/crosssearch/localities`,
+        method: 'POST',
+        body: { columnFilters, sorting },
       }),
       providesTags: result => (result ? [{ type: 'localities' }] : []),
     }),